1965 Fender Twin Reverb reissue transformer cleaning advice

Hello.
While going through my 2004 '65 reissue twin reverb to do a deep cleaning of sockets, etc,
I see that my transformers are surface rusty on the cores.
The housings are pretty good though.
The transformers work properly they way they look, but I would like to clean them up and possibly repaint them.
What are some suggestions for cleaning these properly? Or should I just leave them since they work?
If I do decide to paint them, what paint would anyone suggest?

Thanks for the insight and help.
Steve

It's not broke......don't try and "fix" it.

To quote Ted Woodford. "If it ain't broke, don't break it" lol.