Hi malissa
For your casting porosity problem , Maintaining above cure time and perfect casting cycle i dont get any porosity without any lacquering. Investment powder is way important that you use plasticast or srs cad cast Or any similar ones. Most important is that let investment rest for 4 hours ( which i do for each and every-time now) . Also must check for burnout furnace temperature variation and also rate of increase variation (especially old furnaces as thermo tends to degrade overtime and shows wrong temp ). you could see my work on this link Castable resin casting problems. does anyone getting this?
all are mixed up but many pieces i do is cast able resin especially bigger ones even like bangles and bracelet.
1st rough ones were that rough from my jewel cad file as those files tends to become like that when repaired but believe me i get as good surface as print nowadays. would post some pics from first whenever i would get bit time to do so.