So, since this summer is not going as I had planned, the TODD cab is starting to get some spots of rust on it (especially where it was handled with bare hands) and I want to protect it as best I can as I doubt I'll be anywhere near ready for paint/primer anytime soon.
I've been told to use PPG DX 520 followed by DX 579, how does this differ from the metal prep things from POR15? I've got more than enough of that left over from FEF, are they basically the same? OR is there something else I should be doing?