That is a pic of the first warrior I built that I just stripped to powder coat.
It was off white automotive paint, but just didn't hold up well. I do custom airbrushing and even though I cleaned, prepped and primed the steel it never really was very durable So its off to the powder coater next week
Like I said i do custom airbrushing, not welding. The next three I built were better, but this warrior has about 250 miles, and so far so good.
That was the 2nd warrior I made, I used 1" square tube, I originally purchased for the upright on the back of the seat. I instead liked how the 1.5" looked as it matched the rest of the frame, and used the 1" for supports, it also has a vbrake on the rear wheel.
If you look at the same rear bracing on the tomahawk I made, It has the same supports, but i used the front wheel forks of a donor bike, so they are round and have a taper to the diameter, in case you're curious about how round tube looks
Powder coating isn't much more expensive than a paint job and doesn't involve any graft on your part as the powder coater will blast it clean. A bike frame and forks are £40 local to me. £60 if you want a sparkles in the coating. Just add bolts to any tapped holes (old caps to a BB) before coating to keep the threads usable.