beginner finish

Types of finish coatings -- application tools -- application methods
TonyinNYC
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Joined: Sat Dec 17, 2011 9:00 pm

Re: beginner finish

Post by TonyinNYC » Mon Oct 15, 2012 10:17 pm

I thought the mirror in the Hubbell telescope was flawed?

Dave Bagwill
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Joined: Tue Dec 13, 2011 7:44 pm

Re: beginner finish

Post by Dave Bagwill » Mon Oct 15, 2012 10:21 pm

Well duh - look at the reflections, they are way distorted..:-)
-Under permanent construction

TonyinNYC
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Joined: Sat Dec 17, 2011 9:00 pm

Re: beginner finish

Post by TonyinNYC » Tue Oct 16, 2012 2:51 am

I knew it!! You're setting this guy up!!

ken cierp
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Joined: Tue Dec 13, 2011 11:23 pm

Re: beginner finish

Post by ken cierp » Tue Oct 16, 2012 7:25 am

Tony's point of using many layers of the top coating as the pore filler is a very simple method often over looked. Using a brush you can lay on some pretty thick coats (nitro) -- take care not to make bubbles -- allow extra time for complete drying. Sanding is a little more difficult, use a few more final coats and allow a good long time to cure, there will be more shrink back -- but it does work fine.

peter havriluk
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Location: Granby, CT

Re: beginner finish

Post by peter havriluk » Fri Oct 19, 2012 12:33 am

Tonight I finally got the kit guitar project onto the workbench and I started inspecting the parts and vendor's pre-work. I think the makers got paid for assembling with the least possible amount of glue. Lots of gaps everywhere. Moving right along, I looked at the 'laminated' back/sides of the partly-preassembled body, wherein the back is assembled to the kerfed sides. These 'laminated' sides and back are described as 'sycamore' by the vendor, and is 3-ply with the visible sycamore layer being roughly .010" thick.

And this is the question I'm posing: If I give the surface more than a lick with 320/400 grit sandpaper, I'll be cutting through the surface layer into the center core layer. Any suggestions as to what I ought to do to achieve a serviceable surface quality while respecting the extreme thinness of the layer I'll be sanding on will be most gratefully received.

Thanks, folks.
Peter Havriluk

TonyinNYC
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Joined: Sat Dec 17, 2011 9:00 pm

Re: beginner finish

Post by TonyinNYC » Fri Oct 19, 2012 9:14 am

Well...bondo comes to mind, but that will obscure your wood!

In this case, you will need to accept some small surface variations in the finish. Use a smaller sanding block to sand out the lacquer. If the wood has been finish prepped, leave it alone and get to the finish part. For the back and sides, you can apply the finish pretty thick and it wont hurt the sound, so use that to your advantage and put a thick finish on, then sand the finish level, leaving the wood beneath untouched. Capisce??

peter havriluk
Posts: 984
Joined: Sun Jul 29, 2012 12:30 pm
Location: Granby, CT

Re: beginner finish

Post by peter havriluk » Fri Oct 19, 2012 12:26 pm

Tony, I think I get it. This ain't a project that will tolerate trying to blocksand dead level, sounds like. Build up a thick-ish finish and sand carefully so's I don't cut through the veneer.
Peter Havriluk

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