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Nitro repair suggestions?
http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=22036
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Author:  Alexandru Marian [ Mon Apr 20, 2009 6:40 am ]
Post subject:  Nitro repair suggestions?

A friend stumbled on his microphone stand which fell on the guitar, luckily it didn't hit directly (would have been a total disaster) but just wiped it. The result is a rather serious ding, 1 cm (13/32) long, 1-1.5mm (1/16) (or close to these).
The nitro at one of the long edges of the ding has cracked. The wood looks seem to be just bumped not cracked or crushed.
The wood is spruce btw, the ding is across the grain.

The guy hates marks such as this. If there's nothing to be done about it, he will have to sell the guitar. We were wondering if there's something to be done, if not to fix it completely, at least to make it look less bad.

One last resort option would be to completely remove the finish from the top, steam the ding and french polish it. Not sure about the transition to the sides on the bindings would look like, though.

I have no experience with nitro btw.

Thanks a lot!

Author:  Alexandru Marian [ Mon Apr 20, 2009 8:00 am ]
Post subject:  Re: Nitro repair suggestions?

He just a picture.

Author:  jordan aceto [ Mon Apr 20, 2009 8:17 am ]
Post subject:  Re: Nitro repair suggestions?

A ding like that can be made to look a whole lot better, probably invisible at 4 or 5 feet, depending on his eyesight, maybe perfectly invinsible if you luck out.

It is a job for someone with some touchup experience, the dent will probably be steamed out a little, and then some drop filling/leveling/polishing sessions.

Striping the top and french polishing it (or refinishing it with nitro) is another option, somewhat extreme based on how the picture looks, but if the guy wont be happy if he can detect the ding with his nose pressed to the top it may be the way go, although i would say try steaming and drop filling first, as the top can still be stripped if that does not give satisfactory results.

Lots of guitars have lacquered backs and sides and french polished tops, the transition at the bindings usually looks just fine if you do a carefull job.

My preferred fix is to take a screwdriver and put a whole bunch more dings in it, so the one does not stick out any more(just kidding, but not really)

Author:  Alexandru Marian [ Mon Apr 20, 2009 8:48 am ]
Post subject:  Re: Nitro repair suggestions?

Thank you Jordan!

The guy is absolutely crazy when it comes to dings. So it needs to be either a near perfect fix or refinish/sale.

So, is it possible to steam as the very first step? I have some experience with steaming, I build so carelessly that on every guitar I need to steam dozens of dings gaah

2. drop filling, I imagine this means actually dropping a .. drop of nitro in the crack then level and polish it. I have a friend with a campfire nitro guitar that has about 1 million dings I could practice on.

Author:  jordan aceto [ Mon Apr 20, 2009 10:04 am ]
Post subject:  Re: Nitro repair suggestions?

Yep, you use the exact same soldering iron steam trick, just being more mindfull of the heat because of the finish.

Drop filling does indeed mean dropping... drops of finish on the repair site. Toothpicks work ok, my favorite way to apply the drops is with a plain steel guitar string with a tiny loop bent into the end, so that a drop of finish will sit right in the little loop and not drop off before you want it to. You put a drop on, it shrinks way back, you put on another, it shrinks back, repeat untill the finish is proud of the surface by a little. If the dent is fairly deep, things get more complicated because it will need to be filled with something that does not shrink as much as nitro, like CA, and then ideally topped with nitro so that you avoid witness lines. Sometimes people luck out and get a CA fills looking good, but this guy is probably not going to buy it.

The hardest part is being patient enough to let the fill fully cure, it is so tempting to try to rub it out before its ready, especially when the customer is calling you every day not understanding how such a tiny area could take so long.

FRETS.com has the greatest info on everything, especially this stuff.

Author:  Alexandru Marian [ Mon Apr 20, 2009 10:07 am ]
Post subject:  Re: Nitro repair suggestions?

Many thanks!

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