How to fill gaps in spherical resin molding I'm planning on casting an object in clear resin using a spherical silicone mold and did a test to see what I'd have to expect. It's came out quite well - better than I thought it would! - but around the circumference where the seal of the mold is, there are a number of little gouges:



Some of them are quite deep, 3-4mm. How can I fill them? I thought of using more resin but I'd have to apply it to a centimetre or two of the casting at a time which sounds incredibly tedious. Is there something else I can use in place of the resin, like a paste, which sets faster? I've read about using things like milliput but they aren't transparent.

Alternatively, is it a good idea to just try to sand the whole sphere down a few millimetres to remove the gouges?

Thanks for any help!
Use a clear two part epoxy resin to fill the gouges. 

You can get one with a short drying time (5 minute epoxy) at most hardware stores or even the dollar store. 

Ensure if its a two part mold, not to put the parts together while its drying or they will stick together.

Apply the glue in a ventilated area.