They are finally done!
I decided to use spray primer. It worked great. 3 cans at $4.98 was well worth it. 3 cans covered 7 stools.
I used a brush and semi-gloss paint for the final coat of white.
I made stencils of the numbers out of paper and cut them out with an x-acto knife. They bled under the edges a little, but my wonderful niece came and touched up with a detail brush.
( Thanks Anna!)
I love them!