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Re: filling & finishing

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Forum topic by Oldschoolguy posted 01-09-2020 07:11 PM 693 views 2 times favorited 20 replies Add to Favorites Watch
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Oldschoolguy

108 posts in 693 days


01-09-2020 07:11 PM

Hey y’all, I have a wifey project that will eventually need finishing. She wants a clear polyurethane finish, however, a large opening has to filled first,,,,,,her request. I was thinking of using some sort of filler for the opening, but wondering if poly would adhere to the filler. The top will be used for her T.V. only and is made from hard maple. The dimensions of the opening are 1/2 inch at the narrow part to 3 and 5/8 at the widest part and the thickness of the top is 1 and 5/8. Please help. What to use for filler, if recommended


20 replies so far

View wildwoodbybrianjohns's profile

wildwoodbybrianjohns

1999 posts in 404 days


#1 posted 01-09-2020 08:18 PM

If I had to follow the wife´s wishes in this case(clear-coat finish), I would use epoxy, or cut that bit off and shape the edge.

-- Wildwood by Brian Johns: The Big Bang: Nothing - exploded into Everything. Thanks to Nothing.

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Jack Lewis

576 posts in 1935 days


#2 posted 01-09-2020 09:07 PM

Put a butterfly patch . Make it look like it was planned.

-- "PLUMBER'S BUTT! Get over it, everybody has one"

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OSU55

2658 posts in 2846 days


#3 posted 01-10-2020 02:11 AM

Might be the pic but that looks to be a good size chunk gone. I consider that part unusable. It will look like crap full of filler no matter what you do. Maybe a pic of the whole piece would give better scale, or a ruler.

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Andybb

2843 posts in 1460 days


#4 posted 01-10-2020 03:26 AM



Maybe a pic of the whole piece would give better scale, or a ruler.

- OSU55


+1 and maybe a pic of the underside.

Maybe first fill the entire void with colored epoxy then sand/grind flat. Then use a large butterfly across the void. You could fill with walnut colored epoxy resin or use something colored like a river table. The butterfly would be for esthetics as well as for stability but the cured resin should be pretty solid on its own as the resin will probably tie the whole thing together. If that gap is fragile you could even drill and place a dowel through it before you fill it. Maybe use dark resin to start then use the colored resin with some mica powder mixed in on top of it. Then finish sand and buff.

-- Andy - Seattle USA

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Rich

5907 posts in 1446 days


#5 posted 01-10-2020 03:49 AM

I would like to see a photo of the whole piece, not just the void. To be honest, that looks like a chainsaw accident with tear out.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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Oldschoolguy

108 posts in 693 days


#6 posted 01-10-2020 08:00 AM

Hey guys, what time is it? Oh, it’s 2:30 A.M. stupid. Yeah I know, but I have sleep apnea and this project is bothering the heck out of me. Being a new woodworker and not having the skill set or knowledge….. it’s a challenge. However, as always, with your gracious help, I’ll get through it. Anyways, It’s back to bed and I’ll have more pics coming after I pry my eyes open. As my grandma used to tell me “Goodnight and don’t let the bedbugs bite”. Yeah right…...... later Grandma!!!!!! Thanks so far, we’ll see you later.

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Andybb

2843 posts in 1460 days


#7 posted 01-10-2020 03:53 PM

So the question is are you a newbie woodworker with an essential tool? A CPAP machine? Wouldn’t be without mine.

-- Andy - Seattle USA

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therealSteveN

6297 posts in 1431 days


#8 posted 01-10-2020 05:34 PM

A fellow hose head….. I’d be dead by now without mine.

-- Think safe, be safe

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Think0075

36 posts in 582 days


#9 posted 01-10-2020 09:03 PM

Filling something like that is not gonna be cheap or easy. Epoxy\resin will work, you will need some kind of form to allow the epoxy to puddle up. I guess you could use tape but I would do a thin layer first allow to cure and then you can pour the rest. the tape just probably wouldn’t be able to hold the weight of all that epoxy at once. when it cures sand it down to the same grit as.the rest of the project. Also your gonna need an epoxy that has a long cure time, like casting resin.

It’s hard to tell but that looks like a cookie. If its.not fully dry yet it’s going to develop a lot more cracks. when you slice a tree that way it is very unstable.

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Oldschoolguy

108 posts in 693 days


#10 posted 01-11-2020 12:06 AM

Hi guys, Well here are the pics y’all suggested.

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Rich

5907 posts in 1446 days


#11 posted 01-11-2020 12:32 AM

That definitely looks like an errant chain saw cut. No matter how you choose to fill it, I strongly recommend using something like a chisel or gouge, or even a Dremel with a burr, to make those straight edges look more random. If you fill it as it is, it will look very unnatural. Straight lines catch the eye, and there are few straight lines that naturally occur in timber.

It won’t take a lot, just enough to make them irregular.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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Think0075

36 posts in 582 days


#12 posted 01-11-2020 12:43 AM

It’s really not as bad as I thought, the epoxy could get a lil pricey but that’s it.

I’d use blue tape to cover the bottom and sides so epoxy won’t leak out. I’d probably use the slow cure West systems epoxy, with a little black spray paint to color it. Pour a layer maybe an eighth of an inch thick, let it cure. then pour the rest make sure it’s puddle over the top of the surface. Use a propane torch to pop the air bubbles as they come up. Scrape and sand flush. The side of the piece i would sand and shape with a random orbital sander. Just kind of make it flow with the board, people probably will never notice.

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Andybb

2843 posts in 1460 days


#13 posted 01-11-2020 12:57 AM

Sounds like a plan. Blue tape will not hold that much epoxy resin. It will heat up and the tape will let go and leak. Ask me how I know. I’d use hot glue or a clamp to hold a piece of wood or moldable plastic under the tape on the bottom and sides. I’d use Total Boat or West System epoxy.

-- Andy - Seattle USA

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Rich

5907 posts in 1446 days


#14 posted 01-11-2020 01:08 AM


It s really not as bad as I thought, the epoxy could get a lil pricey but that s it.

- Think0075

I don’t know where you buy your epoxy, but that’s not a large void to fill. Won’t cost much at all.

Working with mesquite, I pour epoxy all the time. The best tape to use is sold as stucco tape. You can buy it at Home Depot or Lowes. It’s flexible and will adhere to the wood quite well. I use a stiff brush to rub it onto the surface to ensure it’s completely stuck.

Another technique that works very well, but is more difficult to do, is to use some silica thickener. Stir a little at a time into your epoxy until it develops a paste-like consistency. At that point, it won’t run and you can use that to seal one side of the void and its edge. Let that cure and then you can pour regular epoxy for the rest of the void.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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OSU55

2658 posts in 2846 days


#15 posted 01-11-2020 02:06 PM

Much better seeing it as a whole piece and that its fixable with epoxy. Good advice given for epoxy and creating some variation of the strait lines. Recommend coloring the epoxy so it is slightly or a lot darker than the wood color.

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