POR-15 Chassis sealer question

I would only caution that you are using adequate respritory protection. Unless the formula has changed, POR-15 contains isocyanates (think cyanide) so a forced air system is required.

I will soon be starting the daunting task of completing sealing the rear end of a 37 Packard with POR-15 chassis sealer. I know I have to put on two prep coats of POR-15 paint (think, black paint) and then a coat of the chassis sealer. I have wire brushed most of the surfaces that I will be working on and will be finishing up the wire brushing prep when I can.

My question is if any of you have done this, do you have any tips for me? I have never done this before so I am flying blind, any advice is greatly appreciated. Thanks