1970 Swinger 340 Hemi Orange 4 speed
I used to use Rage Gold (and my boss switched to a cheaper lightweight filler, that works similarly) and we'd wait for it to get to what we called the "green stage," where it was not fully hard but was just beyond tacky. Then we'd used 40 or 80 grit to knock down the major issues. Final body work came after it had fully kicked. This was used when building parts for car interiors/custom trunks etc. since I do custom car stereos for a living.