Tractor Supply Enamel Question

I have oilbase exterior paint on my camper, over primer. The shell was skinned in treated plywood. The oilbase is staying on very good after 1.5 yrs, except for a couple of spots where I used Liquid Nails to fill some small voids in the plywood. I was thinking of sanding down the camper to get any loose areas clean and applying TSC Tractor and Implement Enamel. Am I making a mistake?? Should I add hardner to this paint if I do use it?? Anyone used this before? Looking to add some color. John Deer Green, NO
Redneck, but not quiet to that level. Maybe Ford Blue and white. Looking to the paint Guru"s to save me from disaster. Thanks for any advise. William
