Body filler?

[orangevert]

When using a filler(bondo) I have read on another forum that as it starts to set up you can sand it down a little?

Ok reasons for my question is, I'm a drywall contractor by trade and we use Duro bond.(easy sand) It sets up like bondo, we can sponge it down with a wet sponge and work it with a knife to get it flat and kill any edges.

Could this be done with filler?

Thanks for any advice
Kirk