Hi, I made my first part out of my first mould.
99% released fine but for some small areas where the tooling gelcoat merged with the gelcoat, please see pics.

I need your expert advise to understand what I did wrong not to repeat.

Mould made on Sunday, removed from pattern on Monday.
Left to rest until Thursday.

On Thursday, compounded with nw1 and polished with topfinish2.
Cleaned 2 times with ec mold cleaner.
One additional cleaning with acetone.
6 passes of Easy Lease every 15 mins
2 additional passes of miracle Gloss framed 15 mins
Left overnight to rest

On Friday two layers of white gelcoat framed one hour then hand layup with polyester laminating resin.

Demolded after 24 hours. It released pretty fine (with a bit of compressed air) but for the spots.

Any clue about what happened?
I think it is almost impossible I missed 6+2 times just those few spots...

Thanks a lot

1. Your gel coat looks too thick. Should be kept less than 0.5mm thick to avoid cracking and chipping. 2. If PE/VE gelcoat styrene could still be present, which affects the release ability. 3. Dont use acetone, stick with mould cleaner, though I doubt this is your issue. 4. Always seal the mould surface several times before using a release agent. This seals microporisty in the mould surface.