Yeah what he said. You don't want to mess around with any type of solvent on Nitrate. It might attack it and make a mess. Make sure you wait a couple of weeks after the last coat of nitrate went on before you hit it with the primer. Otherwise, the nitrate might still be degassing and the bubbles will show up in your primer. I usually stick my nose in the nitrate and if I don't smell it, i'm ready.

carl