I've miss calculated the amount of resin needed for my mould and haven't achieved 4 layers, is there still an option of applying more within a time frame? or is it best to wait and key in and add more??

I only got 2 layers on as there wouldn't of been enough resin to complete the third layer, so stopped at 2 layers. That's what I worry about now is the self bake. How long for a 60° bake? I should be able to do this