My buddy just bought a used boat that has dulled a little bit. What is the best product to use to restore the shine and where do you purchase it at? Thanks.

If you go to the bbc in the restoration area there is a great article on how to polish it back to new. I did mine and it looks great

3M HD compound first, then follow up with 3m finesse, then protec sealer to finish. If the clear gelcoat is already to the flake, it's not going to be saved.