Where is this happening at, on the hull or the bow?? Im kinda confused on what part you are talking about. The average gelcoat is about 10 mills. That can vary between manufacture, manufacture date, mode, and other variables.
You could get some liquid gelcoat and use a preval spray gun and spray it on then use a high speed buffer or alot of elbow grease and a compound and blend your areas after you spray the gelcoat on. Its not as hard as what you think.. I do body and fiberglass work as a side job when I have extra time after my full time job..
If you need more help or have question, let me know.
Nick
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