I have a couple, and I wouldn't even consider painting them. The paint they come with is really smooth, and it seems to repel a ton of substances, including ink and NP. I suspect to get the paint to stick, you'd have to sand them, prime them, THEN paint them. If you've never taken on a project like that...
*shudder*
I did once. I learned my lesson.
Alexes come in a long, unwieldy, super-heavy box, unassembled. Mr.GGA is great at building things and taking them apart, and it took him roughly 3 hours per unit to get them together. Plus cursing. Lots and lots of cursing.