I used some brush on industrial red enamel I had left over from another project. It was very hot and humid when I painted this and it took a full day for it to tack-off and get solid enough to put on a second coat. Once it was dry though it is VERY tough paint...
This was after the first coat.
After the second coat
Added the casters and let it sit in the sun for a day to bake. The paint got real hard after this.