Three and a half years later, the paint hasn't held up all that well. There are a number of chips, and I gave up on touching them up after a while. It appears that the issue is with the Montana Cans colors not sticking tot he primer, as the primer is solid everywhere. I may have sanded the primer too finely so the top layer didn't have much bite.
Montana paints are not great as they are very high in solids, IMO would need to be decanted and thinned to spray properly. No finer than 600 sanding then washing with a paint prep/tack cloth and then 3-4 VERY thin coats to cover with about 5-10 flash time. More than that time and the paint must fully dry and be fine sanded again. Once completely cured apply a clear coat, cure again and apply decals. another coat of clear, sand flat and a top coat of clear. TBH only the top coat needs to be 2k if using it and the under coats can be 1k as it is a much safer product.
I would stress that if it is a real 2k product a normal respirator is not good enough as they are VERY hazardous to a persons health. Use a 1k and ride wrap to protect the frame or if you want 2k get a shop to spray or get a fresh air breathing apparatus.