Dish is 7.5' might be able to do a little S2 with it.
It is spun aluminum, would if be safe to sit in to paint it?
Sure, sit right down.
Then a bunch of us will come over and kick yer ass!
For ruining a perfectly good dish!
Also, unless bare aluminum is showing, I'd just clean it, not paint it.
If you insist on painting it, check out the numerous threads where people have done that.
One which comes to mind is a recent job by Stogie5150, where he used a roller on some Primestar dishes.
AND he used the same trick on a big solid fiberglass 4-segment BUD.
McGuyver restored his sand-blown plastic Channel Master BUD to like-new condition.
Someone repainted his 8' Channel Master charcoal so he could swap it to a guy who was using a 10' Channel Master (painted black) for a sign.
Long ago, Linuxman tried painting an aluminum dish, but in the end wasn't happy with it.
(he had very high standards)
I'm sure you could learn from that thread.
Lots of good stories here on the forum.