Identify this finish, and next steps?

Types of finish coatings -- application tools -- application methods
Dave Bagwill
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Joined: Tue Dec 13, 2011 7:44 pm

Identify this finish, and next steps?

Post by Dave Bagwill » Tue Jun 26, 2018 1:24 pm

I've inherited a guitar body - more on that in the future - but have no idea what finish was sprayed on, or where to go from here.
I've attached a few pix - the bridge was taped off, the soundhole blocked, and the thing is shiny but obviously not completely buffed or anything.
The finish is very hard, I think it must have dried for a few months already.

So - any ideas? I don't normally spray so I'm a little in the dark. I'm guessing it is nitro, but I don't know how many coats. Should I use car products - rubbing, buffing, scratch remover etc and just see how it goes?
Thanks

Cherry/walnut/spruce
Attachments
Side
Side
DSC00278.JPG (203.68 KiB) Viewed 9011 times
Upper bout
Upper bout
DSC00276.JPG (201.87 KiB) Viewed 9011 times
Back
Back
DSC00275.JPG (176.83 KiB) Viewed 9011 times
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John Parchem
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Location: Seattle
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Re: Identify this finish, and next steps?

Post by John Parchem » Tue Jun 26, 2018 3:43 pm

I would try wet sanding, include a drop of dish soap 600 - 800 - 1000 - 1200 then on to polishing. If you make sure that you are not sloppy with the water (like letting one side to sit in it while you sand the opposite side) all of the finishes I use would be happy. You can also use odorless mineral spirit as the lubricant.

If you pick some area thay can not be seen like under the neck heel or even on the tape on the sound hole you can see if alcohol will soften the finish (shellac and some water based) or if you need lacquer thinner to soften, maybe nitro.

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

Re: Identify this finish, and next steps?

Post by Dave Bagwill » Tue Jun 26, 2018 5:15 pm

Sounds reasonable, thanks again John!
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Tim Benware
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Location: Asheboro, NC

Re: Identify this finish, and next steps?

Post by Tim Benware » Wed Jun 27, 2018 2:12 pm

I usually use a Q-tip slightly wet (not dripping) from acetone in an inconspicuous location. If the finish is unchanged it is a poly, if it dulls/dissolves shellac or nitro (edit: almost like you see in that bottom pic of yours).
I've "Ben-Had" again!
Tim Benware
Creedmoor, NC

Dave Bagwill
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Re: Identify this finish, and next steps?

Post by Dave Bagwill » Wed Jun 27, 2018 3:50 pm

Good, thanks.
I'm pretty sure nitro at this point.
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Dave Bagwill
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Re: Identify this finish, and next steps?

Post by Dave Bagwill » Wed Jun 27, 2018 6:19 pm

Ok fellers - sanded to 1200, looks pretty good to me.

I need to polish this puppy. I have, for polishing, the following:
nada

Oh I have an old bottle of McQuire's scratch removal, some very old turtle wax polishing compound, and a hand-held 6" auto buffer with a bonnet on it. Some carnauba wax.

I can afford a couple of small bottles of whatever is needed.
Ideas please!
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Dave Bagwill
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Re: Identify this finish, and next steps?

Post by Dave Bagwill » Thu Jun 28, 2018 2:34 pm

Ideas?
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