about to under coat with fluid foam not surewhere to start

 

The biggest problems with rust is in the rear section of the frame, pull the bed, clean up the frame behind the cab and start there with the undercoating.

The bed bolts can be a bear to get out so get a couple of the Torx Bits and give a go.
Maybe spray the bolts from underneath a few times before attempting to remove them.

When I removed my bed I found a lost of dirt, leaves and debris in all of the corners, use a brush and some air to blow the stuff off.

 

what exactly is fluid foam? is it a spray on type product?

 

Any updates on this?

did you do any prep work?

What product did you use?