By Coldever - 5/7/2019 8:47:07 AM
I'm doing a new mold for a bike project and 98% of my mold surface is perfect but I got a few imperfections on the gel coat surface (see attached photo). Does anyone have a clue what could be causing them and how I can avoid them on the next mold? My mold making process:
- I had a painted mdf plug attached to a melamine board which acts as the parting surface.
- 6 x layers of Easylease 15 mins apart
- 1 layer of Meguiars no.8 after waiting an hour
- Filleting wax applied to the plug/base joint.
- 2 layers of Uni-Mould Tooling Gel Coat applied 2 hours apart
- Layer of 100g chopped glassfiber laminated on top with vinylester resin the next day
- Later several layers of 300g chopped glassfiber laminated with vinylester
- Demoulded after about 30 hours of curing in about 20 degrees.
Btw, demoulding was super easy. First time using Easy-Lease - works like a charm!
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By Coldever - 5/28/2019 2:49:26 PM
Did the second mold and it came out better. I applied the first layer of gel with a more consistent thickness and applied the second coat later than previously (first layer in the morning and second in the evening instead of the recommended 2-3 h inbetween). No alligators this time, thanks for the help!
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