The Guitar Refinishing and Restoration Forum Forum Index The Guitar Refinishing and Restoration Forum
This discussion forum is hosted by The Guitar ReRanch and was created to serve those interested in the arcane art/science of guitar refinishing and restoration. Those with all levels of experience are welcomed to participate.
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Curing Time Question

 
This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.    The Guitar Refinishing and Restoration Forum Forum Index -> FAQ's, Jigs & Tools
View previous topic :: View next topic  
Author Message
Joeglow
Site Admin


Joined: 26 Aug 2003
Posts: 11054
Location: NY/NJ

PostPosted: Tue Nov 23, 2010 2:47 pm    Post subject: Curing Time Question Reply with quote

There are questions constantly about Nitro curing time. Part of the confusion comes from the fact that Reranch 101 says 3 days. If this translates as 3 days per coat it would be more accurate. Other sites/books say 1-2 weeks. 30 days is the time that is usually recommended by the resident experts and that usually works out well. Many go with a shorter time. Sometimes it works, sometimes the finish isn't hard enough to fully polish. Sometimes it polishes it out and then continues to shrink to the point where there are visible flaws in the finish. You can't really go with too long of a cure time but you can go too short.

The cure time will vary with the products being used, the film thickness applied and the temperature and humidity.

It takes years for a nitrocellulose finish to cure completely. The 30 day time is a good approximation for it being cured enough. You can also test by smelling. If you can smell the nitro it's not ready. When it passes the "sniff test" it's time to move on to the fingernail test. When you can no longer dent the finish by pressing a fingernail into it, it's hard enough to polish.

I've had a body that wouldn't pass the fingernail test for over 90 days. I finally set it aside and came back to it several months later. At that point it was extremely hard.

Some other tips.
Let the body cure in a warm, low humidity place with decent air circulation and out of direct sunlight.
Hang the body were it won't get banged around. Laying it on a towel, case etc. can leave indentations.

Thanks to member gkyhn for this breakdown.
_________________
Nothing on earth can stop somebody with the right mental attitude. Nothing on earth can help somebody with the wrong mental attitude.
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.    The Guitar Refinishing and Restoration Forum Forum Index -> FAQ's, Jigs & Tools All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group