Why o why will my gel coat not dry, I’ve done everything that they said....

All things now considered I think it must simply have been that it wasn’t warm enough. All my materials were brand new, I watched the online film and followed the manufacturers instructions to the lettter. I called them before I bought anything so they knew exactly what it was for and I had the pipette and syringe for accrate measurement and I triple checked the quantity

I am in Hants 20miles north of the Solent so I can only think it wasn’t warm enough. It hasnr been anywhere near 18c for 6 months!

Ant tips for removing half set gel coat?
 
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