I think for the money the Case/IH paint is hard to beat.It is power red which is not as red as flambeau red.It's really not that much different shade to me.Here are some pics of my tractors with different paint on them
The tractor on the left was painted with the Case IH paint available at you local dealer,the tractor on the right was painted with ppg.You can tell the ppg has a redder tint ot it.these tractors have been painted for about 8 years.These tractors have been kept inside
This tractor was painted in 1999 with vansickle paint.It has probably had a 1000 hrs put on it since being painted.This tractor has been outside while being used quite a bit.It was used for moving tobacco wagons while harvesting tobacco and once I got it out it would stay out for the day.The sheetmetal has been waxed to keep a shine on it.There is some dulling of the paint where it has not been waxed.I have touched it up with spray cans some over the years.
The Case paint was $61 a gallon last year.I was told that vansickle changed their fomula and it is not as good as it used to be.I would recommend to use at least the Case paint and would use their thinner/hardner/primer ect....
If you are going to do a lot of prep work and take it to bare metal I would consider dupont or ppg.If the tractor has to sit out all of the time I would also use dupont or ppg.
Nick