The post cure is much cleaner than most FDM post processes. Set the piece out in the sun or under a full spectrum light for a short while.
Supports are similar to FDM. Photoresin systems are more dimensionally accurate, as there isn't a big shrinkage or warpage problem. It's less fault prone, especially a top-down like ours, as opposed to bottom up, like the B9 Creator, which have to have a strong bond with the build table, otherwise the build will stick to the vat and peel from the table. Top-down can be much more delicate.