I'm a firm believer in POR-15. I have used it on the frame, suspension, inner sides of body panels, floor pan, etc. of my '61 Studebaker Hawk and no problems 6 years later. Except for the few pieces that were exposed to direct sunlight for a few days everything looks powdercoated. This stuff is tough, and don't worry about getting it on your skin... because you'll be worrying about the inevitabe, you will get it on you no matter how careful you are. I've found that if it dries, you can get the majority of it off by soaking it and using your fingernail... just stay in the shower a little longer. Best storage solution is to clean out a plastic oil bottle, pour the quart into it and squeeze as much oil as you can and put the top on. It will stay useable for a long time.