If your worried about any squeeze out put a thin coat of PVA on the area before you start anything. Sand or grind spot with dremal tool. Clean spot with acitone and Q-Tip. Fill with Gel Coat, cover with tape and smooth. When dry remove tape and clean area with soap and water
. Any extra gel coat will come off the area. Wet sand to 800 grit and pollish. As long as you have a good color match you won't see it.
PS.. I have been doing it this way for years.
Never once have I had a complaint from a customer. In fact I have had people think that I have repainted the whole side of there boat. They couldn't find any of the repairs