Help! Second Box-Fiberglass

Hi,I'm building my second box which is housing 2 12"JL subs,out of 3/4" MDF.Instead of carpeting it like my last one,I wanted to cover the box in fiberglass and put a nice coloured gel coat on it to give it a nice glossy look.I bought the fiberglass matting,epoxy, resin, colourer,bondo,etc. I need some help in which order I sould do things.I put the fiberglass matting on first and put the resin ontop. Then I put the bondo ontop after everything else has cured? I was told for a gel coat to mix my colour with the epoxy does this sound correct? Cause if I do that it doesnt seem like the colour will look right ontop of the bondo.If anyone can help any of these questions it'd be greatly apreciated.Thank you very much for your time

When the bondo dries and I have sanded it smooth I prime it, and then I just spray some paint over the primer...