LumberJocks

AquaCoat question

  • Advertise with us

« back to Finishing forum

Forum topic by hineps posted 08-07-2019 03:41 PM 319 views 0 times favorited 7 replies Add to Favorites Watch
View hineps's profile

hineps

8 posts in 848 days


08-07-2019 03:41 PM

Topic tags/keywords: spraying aqua coat water base lacquer filter

I tried spraying Aqua Coat Gloss Lacquer on a curly maple box. Strained the lacquer before spraying. Not diluted. The strainers are 110-120 I’m using a purple Harbor Freight detail gun and getting what appears to be particles from the gun as I’m spraying. First thought was dust but I can see them hit the surface immediately. Ends up leaving craters in the finish. Is this something particular to water based lacquer? I’ll post some pictures this evening.

Phil

-- Phil


7 replies so far

View TungOil's profile

TungOil

1319 posts in 977 days


#1 posted 08-07-2019 06:35 PM

Looks kind of like fisheye from the photos. What did you spray through that gun previously? Perhaps there is a compatibility issue.

-- The optimist says "the glass is half full". The pessimist says "the glass is half empty". The engineer says "the glass is twice as big as it needs to be"

View pintodeluxe's profile

pintodeluxe

5975 posts in 3295 days


#2 posted 08-07-2019 07:23 PM

Yes, looks like fisheye to me too. It can be from contaminants like dirt, silicone etc. But… even if everything was perfectly clean, too heavy of a coat can cause fisheye. I like to spray 2 medium wet coats, but try to avoid one heavy coat. I’m not saying that’s what you did, but it is one way to inadvertently get fisheye.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View bilyo's profile

bilyo

823 posts in 1584 days


#3 posted 08-07-2019 10:39 PM

Is this a new gun that has not been used before. If so, it needs to be taken apart and thoroughly cleaned. These guns are packaged and shipped with all kinds of crud in them. There are videos available on the subject if you need it.

View Rich's profile

Rich

4832 posts in 1071 days


#4 posted 08-07-2019 10:54 PM


Is this a new gun that has not been used before. If so, it needs to be taken apart and thoroughly cleaned. These guns are packaged and shipped with all kinds of crud in them. There are videos available on the subject if you need it.

- bilyo

Good point. And if it has been used before what did you spray out of it? All of this can add up to the contamination earlier posts mentioned.

Also, the detail gun has a 0.8 mm tip. That’s probably too small for the viscosity of the finish you are spraying.

-- There's no such thing as a careless electrician

View CaptainKlutz's profile

CaptainKlutz

1776 posts in 1976 days


#5 posted 08-08-2019 07:37 AM

Hmm, could be fish eye, could also be water based finish – raising grain or fibers?

Don’t use WB lacquer, but anytime I apply first coat of water based acrylic/poly finish, I see defects.
Unless I seal surface with shellac, or light coat of same water based finish; and then sand it smooth FIRST; always see grain raising defects.
Some folks recommend wetting surface with water, then sanding when dry to pre-raise/remove the grain fibers; but it only helps a little IME. Still see bumps and holes in the first coat of WB finish. Fine grain woods like maple, create a lot more defects than large grain wood like oak.
Suggest try looking for fibers sticking up into the finish using magnifying glass with side light, probably right next to the impressions or rings. If you find fibers, then it’s not contamination. It’s a normal WB finish challenge.

Best Luck!

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

View hineps's profile

hineps

8 posts in 848 days


#6 posted 08-08-2019 11:30 AM

I have been using that gun to spray shellac. I also put a coat of shellac on and sanded prior to the lacquer. I disassembled and cleaned it before spraying the lacquer. There are 4 coats of lacquer on the box. If the tip is too small, would thinning the lacquer a bit help? I have thought about the next size gun with the larger tip, but the smaller container made sense with the small amount of material needed to coat these boxes. (6×6x10). Got a lot to learn about spraying.

-- Phil

View hineps's profile

hineps

8 posts in 848 days


#7 posted 08-12-2019 11:49 AM

Update: I tried spraying with a 1.0 tip from a different gun. Did a little adjustment to the gun and it is looking pretty good. Got rid of the dimples just need to work on dust control some more.

Phil

-- Phil

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com