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French polish - bodying sessions
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Andy Culpepper
Posts: 3023
Joined: Mar. 30 2009
From: NY, USA
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RE: French polish - bodying sessions (in reply to kominak)
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OK I'll just give my whole process for comparison. 1. Fill neck wood - tried a million things and believe it or not Famowood Cherry/Dk. Mahogany works best. Color is perfect, does not shrink, sands easily after half an hour and done. 2. Epoxy fill back and sides if porous wood - that's a whole process I won't go into. If blanca, seal all woods that bleed color with piece of t shirt and shellac. 3. Start body sessions. 1-2 a day until usually 6 sessions. w/fan on, pad on shellac starting in straight motions and then rubbing in circular. no oil. pumice can be used at any time if you think the bridge or headplate is not going to get filled enough. 4. After enough shellac has been built up, wet-sand all surfaces of guitar with 1000 grit sandpaper, backed by a rubber block. This takes 3-4 hours but the grit is fine enough that it's not easy to burn through and you can get it down to a really thin, even layer. After this, wait a few days. 5. This is the final French polish. Make a cheesecloth muñeca, and cover it in t-shirt material. Get dropper bottles with shellac, olive oil, and alcohol. Prepare the pad with equal drops of alcohol and shellac until it is barely damp, then add one or two drops of oil. French polish in straight lines, circles, figure 8s, etc. Start out with light pressure and then press hard when the pad gets dry. Repeat a couple of times for each surface until you get a mirror shine. After this, let it dry for at least a week. 6. Polish up the entire guitar with Maguiar's #7 show car glaze on a piece of t shirt. This removes any oil residue and shines up the finish. All this gives me a VERY light and beautiful finish which is what I want. It takes about 15 hours total.
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Andy Culpepper, luthier http://www.andyculpepper.com
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Date Sep. 5 2011 20:11:22
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Gimar Yestra
Posts: 298
Joined: Jan. 19 2011
From: The Netherlands
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RE: French polish - bodying sessions (in reply to kominak)
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aah thats why it takes more sessions for me, I dont buff it, i just polish it with alcohol/shellac until its high gloss, this takes alot of work because you dont sand the surface smooth, instead you polish untill the surface is smooth and highgloss.... there will always be some sort of texture to the finish this way, wich gives it this realy nice handrubbed look, wich I personally prefer heres my way of doing it. 1. seal with a brush, just to have a bit of shellaxc in the pores so the pumice will stick a bit better when porefilling. 2. porefilling with pumice powder and a thin mixture of shellac. 3. letting the porefilling layers dry for a while, they will often sink in after a week or so. 4. building up the shellac layers, I do this with a pad, going in circles, 8 shapes, and long strokes in every direction to smoothen the surface as much as I can. I mix my shellac by feeling, it my pad dries out to fast I add more alcohol to the mixture. 5. polish polish polish untill it looks nice, I will use a few drops of parafin oil to help the shellac spread and keep it from sticking to much. I atached a picture of my 2nd (out of 6) french polished guitars for the idea.
Images are resized automatically to a maximum width of 800px
Attachment (1)
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Date Sep. 5 2011 20:32:19
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Gimar Yestra
Posts: 298
Joined: Jan. 19 2011
From: The Netherlands
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RE: French polish - bodying sessions (in reply to kominak)
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Andy, I do sand lightly in between, also I think the way you mix the shellac and how you put it on changes the thickness. The 1st guitar I did was putting very thick shellack in the pad and adding alcohol to thin it. What I do nowadays is make a final mixture of alcohol and shellac, I fill the pad once for each session: 1 session for the back, 1 for top, 1 for each sides, so I fill the pad 4 times total to do the body totally, and polish until the pad is dry, so technical I only put on very little ammounts each session. I dont feel this makes for a thick finish, although I could be wrong. I found this method on a french polish instruction DVD I bought from Gunther Dikk, though im still experimenting a bit
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Date Sep. 5 2011 22:44:57
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