As I take the plywood down to insulate,I should use a rust inhibitor paint on the frame and then insulate? Last thing I want in a trailer is a guy with bad lungs and mold.Plan to run dehumidifier all the time and vent water outside.I live on the wet side of Oregon and am looking at the next 9 months of rain.We started airing the trailer out as soon as we got it ,we were having warm,dry weather and I am leary of formaldehyde and George's lungs.Plan to do the ramp door,the front of trailer and the small door first.Any suggestions would be appreciated!!

I am not well to do,so no real expensive suggestions please.Also have to figure out what to put on the ramp door to cover the wood.We will be using it as a patio when it is not down to move the mobility scooters in and out.