Originally Posted by minaret
You are clearly a pro. I'd say at least 90% of the "cosmetic" cracks I grind out are actually glass fractures. The spider web shape is a dead giveaway, cosmetic gelcoat
cracks generally don't spiderweb. Cracks like this can only be permanently fixed by grinding them out and glassing them, not just by filling over them. I've mentioned this here many times to much disbelief. Nice to see a fellow pro on the forum!
I agree..... at least 90% of the time! I get the same response to my opinion about seemingly "cosmetic" cracks.