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Workshop operational tips. #12: Perspex (Acrylic) Repair/CA Clean-up.

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Blog entry by LittleBlackDuck posted 10-09-2019 11:53 AM 1251 reads 0 times favorited 29 comments Add to Favorites Watch
« Part 11: Susan is NOT so Lazy Part 12 of Workshop operational tips. series no next part

Boys and Girls,

I opened my big mouth in one of my comments to a post and rather than live up to my reputation of being a liar, I thought I’d honor my pledge.

I am currently making a display case for my 60 yo(ish) heirloom (post to follow soon).
I was too chickenshit to use glass, other than for delivery of vino to mouth, and decided to use Perspex. The thought of silicon tickled my fancy but not being ticklish and freakish, I decided to use CA glue…

Now CA in the hands of the competent is plausible, but in left hands of a right handed geriatric, if becomes a lethal weapon especially on the first finger adhesion, followed by 9 smudges across the face of the Perspex during the panic rescue extraction of said stuck digit.

Not only did I mess up the face, I also broke the joins revealing several unsightly seams that rendered the pane of Perspex a total pain

and useless requiring re-cutting and more gluing mishaps.

However, salvation is at hand. If you smear Perspex or suffer a premature ejaculation and have a blob in the centre of a face, immediately wipe it off.

DOH! You won’t remove the CA, in fact, you will create an unsightly large smudge, however, the wiped layer will be thin and easier to perform surgery on.

I deliberately blobbed a glob of CA on the reverse side of this clean Perspex (the above piece after initial cleansing) for use to document this blog,

a few more blemishes (red border) on the reverse side to over-dramatise this presentation

There are many videos on how to remove scratches from acrylic using fine sandpaper, polishing compound and elbow grease… well I trained hard to get this body of mine with elbow bending without the grease.

Get out your ROS and depending on the damage, start with 180 grit… you may remove some buildup with a scraper and don’t be afraid of dropping down to 100 and work up to 180 (and on).
I quickly move the ROS over the rough spots till it appears/feels level. Keep the ROS moving so as not to overheat the Perspex in one spot. If it takes more than 30 seconds to get a satisfactory starting point, drop down a few grits again.

I work my way up using 180, 240, 320, 500 and 1,000… only because that’s all I have,

and don’t forget to towel down after each monumental exertion,

Then it’s off to the buffer.

I have a slow spend grinder (1,400 RPM) ideal for 8” buffers. I use the Beall Buffing system and swear by the quality of their buffs. I recommend you don’t skimp and buy those cheap “home depot” type of buffs. They may function better once “broken in” but any monetary savings would be eroded if you cost the break in effort.

Using the Beall system, which starts with the Tripoli compound,

followed by white diamond and finished with carnauba wax. I usually promote the job to white diamond to start buffing if I sand to 1,000. While you can start with the Tripoli, I find it redundant unless I stop sanding at 500/600 grit. A bit of trial and error wouldn’t go astray, to find your best fit… there is no bad way as all you may err in is one too many passes at a lower grit/buff.

For Perspex, I sacrifice the carnauba wax for a Plastx Clear Plastic Cleaner & Polish compound,

but any any other plastic polish will suffice

You may even use EEE,

(however, I don’t like the wax residue… having said that, I always clean up my jobs using alcohol,

deliberately avoiding the temptation to taste!)

This plastic polishing I move to the lathe and use a 4” buffing wheel rather than contaminating my 8” carnauba wax with the polish

The buff being only 4”, I run the lathe at 2,000 RPM.

Again the acrylic had to be moved relatively fast to prevent over heating and potential distortion.

It’s at this stage that you notice all those scratches and blemishes you thought was on the flip side, are actually on the active face and you’re now faced with the chore of going back to the 180 ROS…

Being the nice guy that I am, I did make this quick dirty video (without the porn) for all you guys/galls that hate to read as much as I do, so you can view rather than read the above.

You will notice in the video that I savage the acrylic with my ROSing… rest assured it is not politically incorrect to brutalise Perspex… eventually you will see right through it!

PS. If you are a trhrillseeker, for big jobs, don’t hesitate to take the buff to the job using a cordless drill,

it does as good a job, albeit much slower.

-- If your first cut is too short... Take the second cut from the longer end... LBD



29 comments so far

View pottz's profile

pottz

6389 posts in 1497 days


#1 posted 10-09-2019 06:54 PM

too much reading your blog as usual so i went right to the live action which was entertaining and somewhat informative.you could have at least shown some cleavage during the buffing closeups.this is good info for those that screw things up,no use to me of course-lol.i only tease though,good blog duckie.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View LittleBlackDuck's profile

LittleBlackDuck

2930 posts in 1333 days


#2 posted 10-09-2019 08:13 PM


too much reading your blog …..

- pottz


I had 2 months worth of pent up writing that I had to be release!

You’re also cheating by fast-tracking to the video without laboring through the written word ( and the ocassional happy-snap).

-- If your first cut is too short... Take the second cut from the longer end... LBD

View pottz's profile

pottz

6389 posts in 1497 days


#3 posted 10-09-2019 10:02 PM


too much reading your blog …..

- pottz

I had 2 months worth of pent up writing that I had to be release!

You re also cheating by fast-tracking to the video without laboring through the written word ( and the ocassional happy-snap).

- LittleBlackDuck


hey thats your fault for throwing a tantrum! now do one more blog and you’ll feel better-lol.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View LittleBlackDuck's profile

LittleBlackDuck

2930 posts in 1333 days


#4 posted 10-09-2019 10:56 PM


hey thats your fault for throwing a tantrum! now do one more blog and you ll feel better-lol.

- pottz


Not my fault… IT’S THOSE BLEEDING SIDEWAYS POSTERS… and they put rabbit breeding patterns to shame!

If only my bank balance grew as fast as the new ocurances.

-- If your first cut is too short... Take the second cut from the longer end... LBD

View pottz's profile

pottz

6389 posts in 1497 days


#5 posted 10-09-2019 11:42 PM

hey thats your fault for throwing a tantrum! now do one more blog and you ll feel better-lol.

- pottz

Not my fault… IT S THOSE BLEEDING SIDEWAYS POSTERS… and they put rabbit breeding patterns to shame!

If only my bank balance grew as fast as the new ocurances.

- LittleBlackDuck


theirs that anger again ducks,now take a deep breath and let it out slowly.it’s like being an alcoholic,oops sorry,like have anger management issues,ya just gotta let it go buddy were never gonna get these people to fix it.nobody seems to care,except maybe you and i.
hey i dont want to have do an intervention-LOL.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View LittleBlackDuck's profile

LittleBlackDuck

2930 posts in 1333 days


#6 posted 10-10-2019 01:32 AM


..... it s like being an alcoholic…..
- pottz
pottzy, I keep telling you that I’m a drunk NOT an alcoholic... alcoholics go to meetings!

-- If your first cut is too short... Take the second cut from the longer end... LBD

View pottz's profile

pottz

6389 posts in 1497 days


#7 posted 10-10-2019 02:09 PM


..... it s like being an alcoholic…..
- pottz

pottzy, I keep telling you that I m a drunk NOT an alcoholic... alcoholics go to meetings!

- LittleBlackDuck

yeah me too,going to those meetings is like being at work,and hence the reason i drink.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View LittleBlackDuck's profile

LittleBlackDuck

2930 posts in 1333 days


#8 posted 10-10-2019 02:56 PM



yeah me too,going to those meetings is like being at work,and hence the reason i drink.
- pottz

I’ll drink to that!

-- If your first cut is too short... Take the second cut from the longer end... LBD

View HokieKen's profile

HokieKen

10963 posts in 1651 days


#9 posted 10-10-2019 05:18 PM

I feel misled LBD. Your title says you were gonna “clean up” the CA. All you did was sand it off. Poor CA. Imagine my disappointment.

-- Kenny, SW VA, Go Hokies!!!

View LittleBlackDuck's profile

LittleBlackDuck

2930 posts in 1333 days


#10 posted 10-10-2019 11:24 PM


I feel misled LBD….

- HokieKen


Sorry about the confusion Hoki... being the son of a Hungarian fern cutter, I have trouble forming my words… I just don’t know how to say ”Where’s my drink? in one coherent sentence.

I was gonna titled this post,
Under no circumstances make the blunder of employing tremulous hands while performing the operation of applying Cyanoacrylate glue out of a squeeze bottle onto clear (non-filmed) polymer (containing at least 85% acrylonitrile monomer) if your primary intention is to circumvent any accidental misapplication and you don’t anticipate some form of chaos that the missus will refuse to rectify and you inevitably lose the opacity of the translucent media of the small display receptacle you are creating in an endeavor to provide a dust free environment for some past project!
to ensure there is no confusion with my intentions, however, LJ are a tad mean on the title size so, with minimal consideration for my fellow man, I plucked an unrelated shorter title out of the air.

-- If your first cut is too short... Take the second cut from the longer end... LBD

View pottz's profile

pottz

6389 posts in 1497 days


#11 posted 10-11-2019 12:54 AM


I feel misled LBD….

- HokieKen

Sorry about the confusion Hoki... being the son of a Hungarian fern cutter, I have trouble forming my words… I just don t know how to say ”Where s my drink? in one coherent sentence.

I was gonna titled this post,
Under no circumstances make the blunder of employing tremulous hands while performing the operation of applying Cyanoacrylate glue out of a squeeze bottle onto clear (non-filmed) polymer (containing at least 85% acrylonitrile monomer) if your primary intention is to circumvent any accidental misapplication and you don t anticipate some form of chaos that the missus will refuse to rectify and you inevitably lose the opacity of the translucent media of the small display receptacle you are creating in an endeavor to provide a dust free environment for some past project!
to ensure there is no confusion with my intentions, however, LJ are a tad mean on the title size so, with minimal consideration for my fellow man, I plucked an unrelated shorter title out of the air.

- LittleBlackDuck


it’s totally understandable of a duck coming out of hibernation from a long aussie winter,now have a drink and you’ll be fine.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View robscastle's profile

robscastle

6362 posts in 2717 days


#12 posted 10-11-2019 10:00 AM

I was a bit of a perspex bin diver bandit when I was younger made quite a few items and use some special glue.
I think I still have it if your interested in knowing what it is
BTW you don’t glue perspex edges just run it along the seam and it wicks in!

—Regards Rob

-- Regards Rob

View LittleBlackDuck's profile

LittleBlackDuck

2930 posts in 1333 days


#13 posted 10-11-2019 10:50 AM



I was a bit of a perspex bin diver bandit when I was younger made quite a few items and use some special glue.
I think I still have it if your interested in knowing what it is
BTW you don t glue perspex edges just run it along the seam and it wicks in!

—Regards Rob

- robscastle


Thanks rc, yes I would be interested…

How do you glue the seam (I assume using the glue you are referring to)?

Do you “clamp the pieces together and run it down the outside seam… What about overflow or what doesn’t wick in…

Notwithstanding my abortive use of CA… I suppose the primary purpose of this article was about how you can easily clean up big defects in perspex without using the gentle touch.

-- If your first cut is too short... Take the second cut from the longer end... LBD

View LittleBlackDuck's profile

LittleBlackDuck

2930 posts in 1333 days


#14 posted 10-11-2019 11:13 AM


..... BTW you don t glue perspex edges just run it along the seam and it wicks in!

—Regards Rob

- robscastle


Never thought about surfing the WEB for gluing perspex… After your enlightenment, I did a quick Google and came up with this hit... thanks.

PS. Did some more (UGH!) reading and found out about the glue… hazardous material and will not air freight… any idea where I can buy locally? Did a search and could not find any local supplier… maybe I’m looking at the wrong thing (???).

-- If your first cut is too short... Take the second cut from the longer end... LBD

View robscastle's profile

robscastle

6362 posts in 2717 days


#15 posted 10-11-2019 10:07 PM

Acrifix 192

https://www.youtube.com/watch?v=hnbc7HgbW_w

Wait don’t play it I will look for something more suitable!

https://www.acrifix.com/product/acrifix/downloads/391-20-acrifix-1r-0192-en.pdf

https://www.acrifix.com/product/acrifix/en/products/reaction-adhesives/acrifix-1r-0192/

Plastral Pty Ltd

Address: 370 Darebin Road
Thornbury VIC 3071
Phone: +61 3 9490-0111
Fax: +61 3 9490-0123
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Plastral Pty Ltd

Australia, Victoria (VIC)

I would normally use my sander but somebody pinched it!

-- Regards Rob

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