Hi, I have a band instrument repair shop and I am thinking about investing in the hot coat pro model. We currently sub contract our large overhaul finish work for bead blasting and silver plating. This gives the satin silver look. If I hot coated with a one of your custom silver colors, could we get close to reproducing the finish? I would also like to reproduce the bright, non blasted silver finish. Is that possible? How strong is this finish? Some of the Sousaphones are made of fiberglass. Will this product work on fiberglass?