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Finish checking question

 
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trentonleonard



Joined: 16 Jun 2009
Posts: 1557
Location: West V

PostPosted: Sat May 06, 2017 10:57 am    Post subject: Finish checking question Reply with quote

Will a non clear coated nitro finish still check? Or is it the clear coat that actually checks.
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trentonleonard



Joined: 16 Jun 2009
Posts: 1557
Location: West V

PostPosted: Sat Aug 12, 2017 8:57 pm    Post subject: Reply with quote

Anyone?
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Lon



Joined: 30 Dec 2003
Posts: 6086
Location: Stephenville, TX

PostPosted: Sun Aug 13, 2017 7:50 am    Post subject: Reply with quote

It is my understanding is, nitro paint will not check naturally, only in clear coat. I think it is due to the amount of pigment acting like a solid binder in the nitro base. It also maybe due to the newer formulations of nitro that has elasticisers added that allows more movement before fracture.

There are so many variables in the finishing process, that can cause natural checking, but some have used different methods to create checking i.e.: freezing/oven, shooting dry nitrogen, razor cutting. I think testing with different paints and different methods, might answer your question.
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trentonleonard



Joined: 16 Jun 2009
Posts: 1557
Location: West V

PostPosted: Sun Aug 13, 2017 7:16 pm    Post subject: Reply with quote

Thanks Lon. I have a mjt tele that has checked naturally and very fast. But the guitars I've finished never have, maybe I wetsanded all the clear off?
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t3l3cast3r



Joined: 09 Apr 2009
Posts: 1263
Location: Austin, TX

PostPosted: Mon Aug 14, 2017 7:55 am    Post subject: Reply with quote

Don't feel bad--none of my guitars have checked either. Almost all were clear coated with Minwax. I know there's a lot of talk about "plasticizers" used in modern lacquers that allow the finish to expand and contract without cracking so I'm sure that has something to do with it.

There's a list around here that talks about which clear coats yellow/check the quickest. I think Watco was pretty high on that list.
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Bobby
Austin, TX
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trentonleonard



Joined: 16 Jun 2009
Posts: 1557
Location: West V

PostPosted: Mon Aug 14, 2017 5:21 pm    Post subject: Reply with quote

t3l3cast3r wrote:
Don't feel bad--none of my guitars have checked either. Almost all were clear coated with Minwax. I know there's a lot of talk about "plasticizers" used in modern lacquers that allow the finish to expand and contract without cracking so I'm sure that has something to do with it.

There's a list around here that talks about which clear coats yellow/check the quickest. I think Watco was pretty high on that list.


I've been using minwax for my clear as well. That could be part of the problem.
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t3l3cast3r



Joined: 09 Apr 2009
Posts: 1263
Location: Austin, TX

PostPosted: Tue Aug 15, 2017 3:17 pm    Post subject: Reply with quote

Yeah, I have one that I finished in Watco last year so we'll see how it ages.
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Bobby
Austin, TX
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trentonleonard



Joined: 16 Jun 2009
Posts: 1557
Location: West V

PostPosted: Tue Aug 15, 2017 6:24 pm    Post subject: Reply with quote

I've been spraying my necks with watco for some natural aging and yellowing.
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