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FDP Forum / Guitar Mods, Repairs, and Projects / UV cured grain filler clear coat

M Tracy
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Lafayette IN

Jan 21st, 2017 10:31 AM   Edit   Profile   Print Topic   Search Topic

I'm experimenting with some UV cured stuff, it cures in the sun so you don't need special lights. So far I've got 2 coats if the grain filler on some scrap mahogany. The can says 3 minutes in full sun but its taking 1/2 an hour in January sun.

I'm trying this stuff in a tube, it's about the consistency of thick super glue. I've been smearing it on with a squeegee then block sanding between coats. I'll report back when I get to the clear coats.

Peegoo
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The spotlight

looks like a prison break
Jan 21st, 2017 01:11 PM   Edit   Profile   Print Topic   Search Topic

That stuff works.

You mention thick CA...there are several small-production guitar makers that use CA for this purpose.

Here's one. He sands the CA with 220 and seals with shellac before clearcoating.

Mick Reid
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Australia

American-made in Oz!!
Jan 21st, 2017 04:58 PM   Edit   Profile   Print Topic   Search Topic

@ Peegoo,

How is it that the paper towel doesn't stick to the timber? (scratching head)

I can't even wipe the tip of my CA tube without the paper towel adhering to it.

Peegoo
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The spotlight

looks like a prison break
Jan 21st, 2017 06:02 PM   Edit   Profile   Print Topic   Search Topic

You have to wet the paper towel first with the CA. You use it as a squeegee. It stays wet as you move it around.

If the paper fibers are flooded, the CA cannot instantly polymerize. But a single drop of CA gets drawn into the fibers and set up fast.

Mick Reid
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Australia

American-made in Oz!!
Jan 21st, 2017 08:16 PM   Edit   Profile   Print Topic   Search Topic

Ahhh, that makes sense.

It's a shame it wasn't mentioned in the video.
Some poor bugger might end up with quite a mess!

M Tracy
Contributing Member
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Lafayette IN

Jan 22nd, 2017 08:32 AM   Edit   Profile   Print Topic   Search Topic

It worked. I was able to go from bare wood to dyed, filled, cleared, and polished wood in a few hours. I think I could do a guitar in a weekend.

The clear is a polyester resin that cures with sun in half an hour or so, probably a few minutes in the summer. I just brushed it on and it leveled itself really nicely, there were some small bubbles though.

The sealer and grain filler didn't smell pleasant but no worse than shellac. The clear smelled pretty bad though, the can said low VOC I used a respirator anyway.

I'll withhold my final judgment until I try it in the summer on an actual project, but I'm going to give it a thumbs up for now.



Peegoo
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The spotlight

looks like a prison break
Jan 22nd, 2017 09:47 AM   Edit   Profile   Print Topic   Search Topic

Outstanding. What brand UV filler did you use?

M Tracy
Contributing Member
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Lafayette IN

Jan 22nd, 2017 11:04 AM   Edit   Profile   Print Topic   Search Topic

Solarez. They seemed geared towards fly fishing and surfboard. I figured if it's good enough for a surboard it should hold up fine on a guitar. It seems reasonably priced although I don't know anything about this stuff. They say the fillers and sealers are pretty much compatible with whatever topcoat you choose so I might just use the sealer and stick with nitro or 2K urethane for the topcoat. I've got a quart of the dual cure polyester resin and a quart of the sealer and a small tube of the other grain filler stuff. The resin cures with sun or MEKP so you can make sure it cures where the sun don't shine.

I've got some dyes and stuff as well so if you've got anything you'd like to see as an experiment I'm willing to give it a go. The sealer and clear can be sprayed or brushed on. I did the grain filling inside and just set it outside to cure. I did the clear outside because it stunk, even without MEKP added. I think you could do this in an apartment with a brush and some extra sandpaper if you had to. The smell is gone quickly do to the fast cure time. It sands easily, I leveled the finish with 1000 grit, wet, by hand. It took maybe 1/2 an hour to get the bubbles out and get it polished up on a piece of scrap mahogany about 4" by 16".

Linky

Peegoo
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The spotlight

looks like a prison break
Jan 22nd, 2017 11:08 AM   Edit   Profile   Print Topic   Search Topic

Very cool. THIS ^^^ is how science marches on.

Thanks Mike!

M Tracy
Contributing Member
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Lafayette IN

Jan 22nd, 2017 11:11 AM   Edit   Profile   Print Topic   Search Topic

This is the board, I put some dye, BLO and shellac just messing around. I got a little heavy handed with the sanding. I did 3 coats of filler and 2 coats of clear, one more of each would have been perfect I think. Not too bad for a couple hours though.

Scrap board

M Tracy
Contributing Member
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Lafayette IN

Jan 22nd, 2017 11:20 AM   Edit   Profile   Print Topic   Search Topic

Thank you Peegoo. I'm always willing to try something different and hopefully weird. There's plenty of folks here that know the right way to do things so I'll just stick with the weird stuff.

I'm pretty sure we'll be finding out how it works with flake soon enough.

There will be a lap steel thread soon as well, I think we've worked out all the details so after the current round of sparkling is done the lap steel will start.

Peegoo
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The spotlight

looks like a prison break
Jan 22nd, 2017 12:53 PM   Edit   Profile   Print Topic   Search Topic

I may try this stuff to clearcoat decals before applying the clear nitro over everything. It gap-fills a whole lot better because there's no vehicle that evaporates.

And yeah--I thought about flake too. This will make the process way easier.

M Tracy
Contributing Member
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Lafayette IN

Feb 12th, 2017 02:36 PM   Edit   Profile   Print Topic   Search Topic

I tried it with some flake. Same mix I used on the red strat.


Don't take a drink before clicking

Here.

Peegoo
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The spotlight

looks like a prison break
Feb 12th, 2017 02:40 PM   Edit   Profile   Print Topic   Search Topic

"THERE'S NO PLACE LIKE HOME!"

[click click]

Hammond101
Contributing Member
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So. Cal. USA

Feb 14th, 2017 03:17 PM   Edit   Profile   Print Topic   Search Topic

Could you shove it in a tanning bed to cure it?

M Tracy
Contributing Member
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Lafayette IN

Feb 15th, 2017 05:45 AM   Edit   Profile   Print Topic   Search Topic

I don't see why not. The website says it'll cure in artificial light. I don't have a tanning bed to confirm that.

M Tracy
Contributing Member
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Lafayette IN

Feb 19th, 2017 11:46 AM   Edit   Profile   Print Topic   Search Topic

I finished them. Two sunny afternoons, one of them was only about 35 degrees. I could get 2 or 3 coats an hour on the clogs, most of that was sanding. It was curing in maybe 7 minutes.

The only downside is it cures brittle, not nearly as forgiving as 2k urethane. There's also tiny bubbles that need to be sanded out between coats. Other than that 2 days instead of 3 to 4 months is a lot of upside.

Ruby slippers

M Tracy
Contributing Member
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Lafayette IN

Feb 19th, 2017 11:50 AM   Edit   Profile   Print Topic   Search Topic

I think I'm going to try one more experiment. I'll bury the flakes in the sealer so it'll sand easily, then top coat it with 2k urethane because I think it polished up better.

Whole set

FDP Forum / Guitar Mods, Repairs, and Projects / UV cured grain filler clear coat




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