I just use regular spray paint. It lasted a
couple of years before peeling. By that time
I was ready for a new color. Brand name paints
might last longer.

If you are gluing stuff on top it seems like you might want to prime it first with one of those primers that stick to anything. Don't know for sure as I've not done a bb.
kathy

I have a whole write up about this topic on my website in case you'd like to take a look at it.

Here is a link that might be useful: My Website

Thanks adina72 i added it to my favs...

Oh, bb's can't be left outside in winter? Hmmm. I hadn't realized that before. I leave my glass gazizng balls out all winter.
kathy

Kathy - Depending on what they are made of, they can crack during freezing temps. You just never now, so I bring all mine inside the shed over the winter. I've had some sit outside and not crack, but as soon as you put something on it, it wants to crack. I just don't have the heart to take a chance on it, so I bring mine in.