Gel coat can be sprayed or a paste. Most small repairs are done with paste, and larger areas are sprayed. Gel coat on top of gel coat will flak off unless preped right. Sounds to me like they did not do a good job finishing. Wetsand with 600 grit and then 1000 grit sand paper, 3M Finesse the sanded area, and then wax.. Should be good to go..
Bullet Lines www.bulletlines.com