I'm doing casting with yellow resin, in white gold 18k (nickel alloy zinc alloy) I burn it at 400f (1 hour) 800 (2 hour) 1400 (3 hour) and 1100 (one hour). I'm heating the gold with oxygen butane, I'm using vacuum. But I have many pores in the bottom of the rings, what do you recommend? the pores when sanding come out more and more.
The curing is perfect, 6 hours in UV and one in the sun. Hard pieces
gold has already been used twice, but with new gold, the same thing happens to me, regards!