Nitro finish...knicking

[dmraco]

I have been working on a nitro finish on a LP.  I noticed that if I somehow hit the finish with somthing hard...like a wedding ring (SHIT), I get a small white colored knick...obvuiously damaged the finish somehow.  If I spray more nitro on it...it goes away.

Is this because the nitro is not fully cured yet or is this typical of cured nitro too.  This is only happening on my StewMAc nitro...not my DEFT (not even sure if that is nitro)

THANKS!!!

 

[Patrick from Davis]

The layers of nitro melt each other.  I had the problem where a drop of denatured alcohol caused a spot, came right out.  The grittys from a light spray job will melt into the next layer.  The solvent dissolves the layers into one another and you end up without a prob.  One of the many saving graces of nitro.
Patrick

 

[dmraco]

thanks Patrick...what are you thoughts on the cuase of the nick?  lack of proper cure time?  At this point if is very fragile even after about 4 week cure.

 

[jackthehack]

More than likely it is due to the finish not being cured. I tried the StewMac nitro a long time ago on a build and never noticed anything like that, but never "nicked"/bonked a body before it was completely dry. The StewMac nitro is good product; I use the Deft as it's half the cost and available locally.

 

[dmraco]

More than likely it is due to the finish not being cured. I tried the StewMac nitro a long time ago on a build and never noticed anything like that, but never "nicked"/bonked a body before it was completely dry. The StewMac nitro is good product; I use the Deft as it's half the cost and available locally.

Thanks...I have it hanging with no need to touch it for 60 days.  I like the DEFT alot better too.  Seems to go n smoother and dry faster...live and learn.

 

[-CB-]

Yes Deft is nitro-lacquer.  Do not mix lacquer brands, you'll get a mess when you try to level and buff it to a gloss.

 

[-CB-]

Let me half take that back... you have a high degree of a problem on new finishes, more so than making a repair of an old finish with some unknown lacquers.  Thats because repairs will be made on a long cured instrument.   On a new finsih, when the nitro is green, and curing (and it does for a long long time) then you're going to run risks mixing types.

 

[dmraco]

thanks.  I am still using the stew mac...the deft was on a different Guitar.  I am assuming..."hoping" the nicking is from the nitro not being completely dry.  One this I noticed...it is only happening on the Mahogansy part of the guitar, not the maple neck or top.  Cold it be the sanding sealer (stew mac) I used it still not cured too??

 

[-CB-]

Its probably because you used more finish on the mahogany in an attempt to "smooth" things.  Maple and thin nitro go hand in hand

 

[dmraco]

Its probably because you used more finish on the mahogany in an attempt to "smooth" things.  Maple and thin nitro go hand in hand

you are correct there...sanding sealer only in the mahogany.