DO I need POR15 at this time?

[truck69]

I have been driving my 69 Chevy Custom Camper just around town and the body is solid. The cab corners will have to replaced sometime in the next year or so. The bottom of the truck is not rusted out or anything like that. I went to a car show today and went thru the vendors and a POR15 dealer was trying his hardest to sell me a 110 dollar gallion of POR15 to put on my truck. Next year I will have enough money to replace the old motor and get body work done. The truck will be stored until then in my unheated garage during the Michigan winter. Do I really need to start putting this stuff on to stop it from turning to dust or will it be aok until next year?

Thanks. Truck69