gel coat chipped

im sure there are numerous threads about this topic but i have a few places on my boat where the gel coat has been chipped off and you can see the fiberglass. my father said to use white marine tex. what do you all think? i know gel coat is a type of paint but can you brush it on a spot after you have repaired it with some sort of epoxy or just use a colored epoxy or what. ???

thanks in advance for your input