I am getting ready to paint my 57 Chevy truck frame with Extrme Chassis Black. I have sandblasted the frame and plan to use the Extreme Chassis Primer before the topcoat. There is a very small amount of flash rust on the frame. Would using your Fast Etch followed by a wipe down with PRE be a good prep for the primer? I have looked at the instructions for these products online, and it appears that the Fast Etch needs to be neutralized before I apply the primer. Thank you.