I have been using HGSG for years now. It is by for the longest-lasting and durable product I have used. I usually apply 3 coats over a few days each spring. First, however, I do a cut and polish with my DA. Detailed Image has a guide for applying HGSG that nearly fool-proof. The end result is spectacular withthe silkiest, slick candy-like gloss. This is an older technology but one that has withstood the test of time. Great stuff, and a 16.9oz bottle can last years.