quick repaint for working tractor, no fresh air resperator

I had to take apart my old Ford 650 to replace the fuel outlet/valve. So, while the tin is off, I want to do a basic repaint. I don't have time for an in-depth restoration, but I want to do a decent job.

I have pressure washed it, but I plan to do it again, perhaps after a good scrubbing with TSP. I probably will put it on jack stands and remove the rear wheels so I can at things better.

My biggest question is what to do about painting the engine/trans/rear. I am ok with brushing, but I do have a Campbell Hausfeld HVLP rig that works pretty well. Also, I do have a decent HVLP gravity feed gun that I use with my compressor (and an air cleaner and regulator).

I have seen tractors that had the cast parts brushed and came out well. The tin would certainly get sprayed.

I have a good respirator, but do not have a fresh air system. I'll be painting in a open air pole barn. That is, there is a roof, but no walls, so it is like being outside in terms of air movement, but is protected from rain.

The condition of the old paint on the chassis/engine is not great. It has peeled off in many places revealing black underneath. I'm thinking maybe getting some of that orange paint remover, and cleaning off with the pressure washer. Or not.

I'm thinking that a 2 part system is probably a bad idea without a fresh air respirator. Not totally ruling it out, but my health is the main concern.

Seems to me that some sort of self-etching primer, and tractor supply paint with hardener would be a decent approach.

Opinions?
I know most of the posts on this forum are basically my question, but I figured I'd ask anyway

Lynn Kasdorf
Waterford, VA

A twisted wire cup wheel in a grinder is a really good tool for paint removal. Consider removing a few things that are easily removed in order to get behind, such as dist cap and wires, generator, carb and air cleaner, seat, fenders, etc. Self-etching primer is a real good idea if you want it to last, Spraying will be way faster and easier than brush painting. Removing parts is usually faster and easier than masking them.

I would go ahead and spray paint it using the respirator you have but do it when there is a light breeze and try to stay upwind from the paint. Then when you are done,throw the charcoal filters away. If you find yourself having to go downwind from the paint, hold your breath.

If your health is the main concern, as you say, then the answer is really simple - stay away from all hardeners that contain isocyanates (the vast majority do) unless you have the proper respiratory protection (supplied-air). There are plenty of paint products available that do not actually require hardeners. You mention Tractor Supply paint with hardener - don't add the hardener - check the label - it should be optional if it's mentioned at all.

I'm not a fan of self-etching primers. I'd use whatever primer is recommended for the Tractor Supply paint you are intending to use.