Nice build. Are you using the por 15 de-greaser and metal prep steps or just painting por 15 onto sandblasted metal? I'm Just trying to learn about por15.Thanks.
Both and neither.... Hang with me.
It depends on the part. If it will fit in my blasting cabinet and after blasting I can't see a spec of rust or grease.. which is rare with these old parts, I may just wipe off the dust with a towel, then blow off with the compressor. Then wipe off with alcohol if I don't have pre at the moment. I'm pretty anal about degreasing before it goes in the cabinet though. Blasting to bare metal, and clean metal should negate the need for the acid, if it's clean metal.
Some parts, a lot of parts, don't fit in the cabinet. I've used a pressure pot blaster on those outside. Like the bedsides. On those they got clean it then I still did the degreasing and acid steps then wash but wouldn't do that again because they flash rusted , I guess I'm getting at you don't need to do the extra prep after blasting.
Now the frame, I didn't blast. I welded some repairs, and used a sanding disc on a die grinder to getting all the gunk off along with lots of elbow grease and wire brushes. That I used the directions for. Prepping to a far more degree than they say is needed. I got the frame pretty close to shiny metal then degreaser, then acid, then the paint.
In all of these cases the result is a very robust coating. I have failed though. On new patch panels I just degreased and acid treated, ten painted, this just peals off. Iim my experience I wouldn't suggest using it on new metal without running over with 80 grit maximum just to give the paint a mechanical adheasion.
So to wrap up, it is a rediculously robust coating but only if you give it a good surface for adhesion. You may or may not need to use all the chemicals for prep