Here is what I did.
Stripped out the lower part of the interior including seats, carpets, and any other junk on the floor from the pedals to the tail gate.
Then I vacuumed allthe dirt and followed up with a good scrubbing with laquer thinner.
After that dried, I sanded with 80-100 grit sandpaper everywhere you are going to put the product.
Next I wiped down again with thinner to remove any sandings and oils.
Using masking tape I masked where the product will stop on the fire wall, on the sides by the seat belts, all the bolt holes for the seats and along the top by the tailgate.
I went with Herculiner because I like the granual rubber texture. If you want a smooth texture I recommend DupliColor. Herculiner is available in black, red and I think blue. DupliColor makes a tintable liner so you can match any color you want.
I applied a light coat first then laid out the rest of the gallon after 15 minutes. I put thicker material on the floor boards and bed. Two coats on the sides were plenty for the effect and protection. When it starts drying you can really build it up to a desired thickness.
Once all the product was applied and set up for an hour from the time I started, I peeled away the tape to reveal a crisp clean line.
Allow this to really dry before use, probably 2 days or so. then install your seats and whatever else.
I don't think it's to bad for cleanup just use a hose and some Castrol SuperClean.
By the way if anyone has rusted drain holes I have a tool I made for stamping new dimples for the drain plugs. I can make any size patch panel you need for your floor and you can weld it in.(E-mail me for details or if interested)
I hope my little instruction helps out.