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Alternative to nitro's long cure time?

swinginguitar

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have you had success with any other finishes that cure to rub out and assembly any quicker than nitro, such as a pre-cat/crosslikning finishes etc? I'm looking for specific product recommendations here...

nitro is great, of course, but it takes so much time to cure hard enough to buff and put hardware on, and it seems like even after a long while it's prone to printing/marring/checking and tends to shrink revealing decal edges etc (i've tried many brands..including some newer non-nitro lacquers intended for cars...all evaporative)
 
The modern formulations of lacquer are much less prone to printing/marring/checking/shrinking/yellowing than the stuff that's been used in the past, but it'll still do it. It just takes a lot longer. I don't know that I'd worry about most of it, other than the shrinking. That still happens. As you can see in this thread where I detail the construction of the L5S in my sig, even a modern finish will turn out great. This is a shot of the lower bout where I had filled several holes for pots and switches that were in places I didn't like them, then finished over them...

IMG_2929_Sm.JP

IMG_2930_Sm.JP

I don't have a picture of how it looks now, but if you hold it in the light just right you can see where those holes were now, because the lacquer shrunk. And I mean to tell ya - I thought that body was perfect before I shot the color/clear coats. 8,921 hours of sanding, filling, base coats, etc. went into making that surface flat.

This is why Warmoth or anybody serious will not ship a finished body until it's sat for a while and got its mind right.

You can avoid some of that by using a catalyzed finish, but it still takes time for it to harden to the point where you can sand/buff on it without ruining it.

Nothing else even comes close. Lacquer is very forgiving for the DIY guy, as you can cure a lotta ills after the fact. Catalyzed finishes are usually a lot less work, but they're very unforgiving. You gotta get it right on the first pass because trying to fix them after the fact can be a cast iron bitch, if you can do it all. Plus, they're hyper-toxic so you need a helluva paint booth to play with them.

Everything else is just kukka. There are shellaces, varnishes and oil-based finishes you can apply that can be made to look very good, but they're a helluva lotta work and they're generally not very durable.

Long story short, stick with the lacquer. Take up yoga or a horny girlfriend to gain the patience you need to wait out the curing process.
 
It's Cagey's world, the rest of us just live here.


That said - there are some finishes that lock up REALLY fast, but they require really aggressive safety measures.


Some folks are getting good results clearcoating with Spraymax 2k, a product aimed at the automotive market, but one that some guitar builders find quite suitable as well.


http://www.spraymax.com/index.php?id=361&L=1


I've seen it at various online sources from about $19 to $30/can.
 
+1 on SprayMax.  You can buff in 24 hours and it goes on great, producing a high gloss finish.  Make sure you pick up a SAS or 3M respirator though ($20), unless you plan to die young.

Nitro never truly cures and can react to other surfaces while the catalyzed urethane is super stable.  Think about what is on your car - it isn't affected by temperature and everyday abuse.  If your car was nitro, you'd be lucky to get out of the parking lot without chips and scratches.

The only reason Nitro is still used is that people believe a guitar build like it was in the 1950's is superior to your local Korean one.  Your guitar breathing better with a nitro finish is akin to Ebby Calvin "Nuke" LaLoosh breathing through his eyelids.  A thin finish is desirable, that's all.
 
Jake said:
+1 on SprayMax.  You can buff in 24 hours and it goes on great, producing a high gloss finish.
Make sure you pick up a SAS or 3M respirator though ($20), unless you plan to die young.

+1 on the respirator. Don't screw around. Those 2-part catalyzed finishes work great but are toxic as hell, just for starters, and in addition they'll coat your lungs over time and cure there, gradually sealing them. No recovery from that. You'll eventually suffocate.
 
Cagey said:
I don't have a picture of how it looks now, but if you hold it in the light just right you can see where those holes were now, because the lacquer shrunk. And I mean to tell ya - I thought that body was perfect before I shot the color/clear coats. 8,921 hours of sanding, filling, base coats, etc. went into making that surface flat.

Outstanding job.
 
I had to get a neck finished in a hurry, so I broke down and tried the Minwax Wipe-On Poly in clear satin, great product and I managed to get it done in a week. Given humidity factor, I would have had to wait a week between coats shooting satin nitro...
 
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