Hello everyone. I'm looking for some sheet metal opinions. I recently purchased a 61 Impala that had the sheet metal blasted and then was never primed. I have no idea how long ago this was done. The metal is a bit coarse to the touch. Will 80 grit on a DA be sufficient to remove this surface rust and not have future issues? I've read that priming should be done within like 24 hours after blasting. Definitely not my case. I'm not a body man by trade so any input would be great. Thanks!