RE: Will it be good for another 15 years?
Nice to see this bird coming together. We seem to do things in a similar manner...Behr paint, hand cut stencils, clear coat, etc. I think the System Three clear is similar or even the same as Nelson's clear. It should go over the latex just fine. I found it hard to spray, but then it's very dry here in Utah. It seemed to dry before it would level out. Also, I cut my blue tape stencils on glass and then apply then to the plane, but what ever works for you. Very nice build/rebuild!