Epoxy primer

When I mention SPI epoxy is sandable I am referring to IF the time spam has passed and it needs a scuff before going on as to the next step for me is in high build urethane or a poly primer.

For those that don't know, epoxy primer is great because of its ability to stick to darn near anything ( even cat chit??), it is so tough, a great sealer, plus reduced it is used as a sealer over the snading primers before topcoat.