I didn't do step by step pics. I'll try to give you step by step instructions though
Scrub the whole underneath with PURPLE POWER straight, dont add water, (use rubber gloves and wear long sleeves, face shield and pants)
Use a pressure washer to rinse all that you cleaned with PURPLE POWER
Allow time to dry... I used a kerosene torpedo heater to dry mine quicker
Using a drill and or grinder with a paint/rust stripping pad remove paint and rust. I found it easier to use the pads instead of the wire wheel, it went alot faster especially with the grinder but you WILL need ALOT of stripping pads, they are not cheap! also wear eye protection and a face mask
When all the paint and rust is removed use an air compressor and shoot the whole underneath clearing away dust residue and so on
Use painters tape, tape off grease fittings, shocks, bushings and anything else you do not want paint to get on....Cardboard is a life saver with this as well for bigger things to be taped off
I used VHT rollbar and chassis paint/undercoat. I used black satin and high gloss black. 2 coats of satin final coat gloss. i let it dry about 30 mins between coats.
Let the last coat dry for atleast a day before you drive the truck.
Any questions PM me....in case I left anything out.
here are some pics of when i did my step bars the same way