Hey don't use Crown use Rust Check, I had a 90 GMC pick up that had Rust Check and the truck was like brand new, I sold it in 02 and it didn't have any rust at all

 

Rust check is HACK!
Krown has held the overall title for years!

Im just saying from proof.
just my 2 cents.

 

Yeah me too,.... I spray mine underneath every year with the green gooey rust check cans(usually 3 cans) and under the doors,.. door frames,.. behind front and rear lights, you`d be amazed at how many areas you can get to on your own without drilling any holes,... mine has holes from the previous owner so I use them but I haven`t had it "Sprayed" since i bought it and it hasnt rusted any since I`ve owned it,... even the little surface rust spots underneath on the floor haven`t gotten worse since I`ve sprayed it. You know,.. the little spots along cut or fold lines. Just do it yourself.