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#1
11-08-2014, 05:42 AM
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Help for repainting my Yamaha APX 7
After 20 years I decided to give back to my Yamaha APX-7 a new dress. It was a long time I wanted to do, taking advantage of the fact that the excellent internal amplification unfortunately does not work, I removed all and I'm checking to see if I can fix it and how can I do.
What I want to mention here, however, does not concern the electronics, but the coating, so I unvarnished the entire back of my guitar, bringing it back to live wood. The Yamaha clothed these guitars with a very tough paint, which seemed plastic, I never liked it, and I think it was blocking too much of the natural vibrations of the wood. Now I would like to lets see the natural wood, perhaps with an amber color a little darker. I've been reading around, I found that would agree to go before one or more layers of lacquer and then overlay some natural varnish, but I'm not understanding much, too many different directions and techniques. I ask for help in this forum! Is there anyone can tell me what exactly are the steps to follow in order? What are your recommendations? I try to post some photos to giva an idea. Thanks !!! 
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#2
11-08-2014, 06:20 AM
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I can think of three options which don't require lots of workshop equipment.
French Polish is one of the oldest finishes for both instruments and furniture. It is very simple in terms of equipment but requires a good deal of skill. There is lots of information online for you to search. Secondly, I've not done this but heard about it, you can buy aerosols of clear varnish for Alloy car wheels which is the same sort of varnish as used on classic American guitars. Again online research for how to info. Thirdly I use one pot polyurethane varnish, sometimes called yatch varnish. Brush on three coats, flat off, repeat and buff. This may not give the mirror finish of other varnishes but it will protect the wood and allow it to move. Equipment needed is varnish, brush, thinners, wet and dry paper and polishing compound. If you have a compressor, or access to one then there are more options.
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#3
11-08-2014, 09:12 AM
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thanks for advice, let me check which of the three I could do, depending on the availability of prodottti that I can find.
In the meantime I'll attach some pics of the guitar during the work: First I coat a layer of paint remover and and scratched off: https://www.dropbox.com/s/v395ouy8ug...5conv.jpg?dl=0 https://www.dropbox.com/s/gp8gldv7gp...7conv.jpg?dl=0 than with sandpaper machine, I've I brought the wood out https://www.dropbox.com/s/94rsdrpnsx...2conv.jpg?dl=0 https://www.dropbox.com/s/zk30e2deo3...4conv.jpg?dl=0
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#5
11-08-2014, 10:49 AM
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Quote:
https://www.dropbox.com/s/pqzkjqdmrj...9conv.jpg?dl=0
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#6
11-08-2014, 10:58 AM
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I would proceed to paint. 
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#7
11-08-2014, 11:30 AM
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If everything looks stainable, perhaps consider a dark stain and a brush on clear coat. It's pretty easy and you can get the supplies no matter where you live. Use pre-stain, a foam brush, and sand between clear coat layers in order to get a smoother/shinier finish.
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#8
11-08-2014, 11:40 AM
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#9
11-08-2014, 05:37 PM
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No, actually I do not know how to use the gun, I always used the brush to paint the wood (furniture, not guitars) and I do not think I'll start using it now. As Bowie said, the guitar is not a good subject on which to set me up for the experiment.
 Just to be sure, so you recommend me in this order? I ask you to please confirm the order of steps and my questions in each step: 1. apply a single coat of pre-stain with a foam brush (or normal brush?) 2. apply a dark stain with foam brush (or normal brush?) 3. apply a clear coat of paint over the stain dark with foam-brush (called yacht varnish polyurethane varnish, or other kind of varnish too? Can you give me some examples of usable paint or links?) 4. sand (which number of sandpaper do you recommend?) 5. apply a second coat of clear varnish 6. sand (which number of sandpaper do you recommend?)
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#10
11-08-2014, 05:56 PM
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#11
11-09-2014, 04:04 AM
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So in this case, the word stain in my language (Italian), is translated as "mordente" (something like "biting") . The "mordente" is a substance that is to be first of all the rest just to fill the pores. But if you tell me which is the opposite then I suspect there is a problem of translation. Could you send me links to images so that you can understand what you intend to stain, and what do you mean by clear varnish? thanks so much for you kind support
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#12
11-09-2014, 09:03 AM
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What I call 'clear varnish' is perhaps what you might call 'paint' without colour.
http://www.wood-finishes-direct.com/...type/varnishes The finish is hard and protects the wood from moisture and dirt. It can be shiny or gloss and it can be less shiny and satin. For me a 'stain' is a liquid colouring agent which does not add protection. http://en.wikipedia.org/wiki/Wood_stain Hope this helps.
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#13
11-09-2014, 09:59 AM
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Ok , Thanks for your link , is more clear. Is right like I had understood before.
So I'm gonna do a layer of brown stain for pores filling and than some coat of clear varnish, sanding each layer. Which number of sandpaper do you recommend for a glossy effect ?
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#15
11-10-2014, 04:53 PM
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So... guys, after research in various shopping malls and paint stores in my area, curiously, I could not find polyurethane varnish, but I found the shellac prepared and a tampon. So I am going to begin to educate myself on how to apply this method, follow tutorials.
I'll try to figure out if I can put the water stain dark wood color as first base, then move the shellac. we will see! thank you very much for the help you have given me.
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| Tags |
| apx-7, paint, vernishing, yamaha |
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