Hello, A couple of questions...

The 3M Seamsealer seems to be the industry standard . It can be applied either before or after painting and can be tooled with stick or with your finger . there is no need to apply it the same way the factory did . they used way too much and sometimes they didn't even cover the seams . Please, please , please don't use Rustoleum . It's crap and can be wiped off with lacquer thinner , junk .