I used 2 quarts on a Hobie 20....I removed a lot of the gelcoat but not all, used the recommended primer, Sanded with 600 and Applied two top coats of Awl Grip. It turned out S0-SO, if I were to do it again I would do all the prep work including the primer coat and then let a pro apply the top coats.
"You get what you pay for"
Eric Arbogast
H-20 #584
CABB
MYC