Alvin,
I'm an advocate for tractor paint. I've used on many items, furniture,trailers,kids bike,my 4t6 and my daily Chev driver. It holds up fairly well. Agree with above as to using hardener. All paints have there places and uses. I've used acrylics,laquers and BC/CC. For everyday use I see no problem using tractor paints. Preparation is the key to any paint job. Pics below of 4t6 paint and daily driver. By no means am I an expert just my opinion.
Dan
http://rides.webshots.com/photo/2750634870071274430qzyNpf
http://rides.webshots.com/photo/2750634870071274430qzyNpf