Hi there I'm still reasonably new to prop making and was wondering how you guys handle pitting when face with it during a build? This is the first time i've handled this sort of prop / material before, but i thought it looked a simple enough model to make. However i've spent the last three days doing nothing but sanding it. When it arrived the whole thing looked bumpy, bent and just plain terrible. As i'm sanding it, i'm discovering this tiny pin holes. I'm guessing these are air bubbles from when it was cast. With the last couple of props i've made, i've used this blue and white, gum type filler that you rub between your fingers to mix. But i think it's a little to thick for these holes. Anyone have any advice? i'm in the UK.