I slipped on mud last winter and bent my lever like yours is, all i did was use a large adjustable spanner to bend it back. If you do it slowly and the metal isnt cold it may be ok, mine was anyway. Just bent out a little bit at a time,dont try do it in one or it will snap.
Take it the black panel got scraped at the side at the rear footrest? Did that too
1st time i came off at 20+mph on a bend and smashed it to bits so i got a new old belly pan. About 2-3 months after i fitted it i came off again and scratched it a bit in the exact same place, its a vulnerable spot to get damaged if the scooter goes over. I was annoyed and pussed off, was going to look for another belly pan but after a day or 2 i forgot all about it and i still have left it alone now. Its not cracked, only s ratched, so its fine, most people wont even notice it.
As for the paint.....
Unless you paint the whole panel it will look sh**, poss worse than the scratch you have now. To do it right you need to take off the panels sand them down and repaint them, primer, top-coat, then laquer.
Why not just put a cool sticker over it till you sell it? If you put the one on each side the buyer wll just assume you like stickers and think "soon as i buy this the 1st thing im going to do is take off those my little pony stickers when i get it home".