So I'm planning on spraying Boshield T9 everywhere I can on this truck, inside the doors, inside the hood, inside the fenders, etc. Question is, what should I do about the frame and suspension? The body on this thing looks great, not really any corrosion other than the front fenders, but the frame and suspension looks bad. I'm not worried about it breaking, bad, but what should I do before winter?

Option1: Nothing, and grind/paint next year

Option 2: Spray with used oil (which would make grinding/paint next year super annoying)

Option 3: Quickly paint it with rust convertor and leave until next year

Option 4: Spray with Boshield T9, which would make painting next year more obnoxious

I just don't feel like I'll have time to do it properly this year.

 

don't spray engine oil on the frame...it will wreck every rubber bushing it contacts.
amber rust proofing is a good product that you could easily power wash off before next years prep