removing sticky from vintage mego Supes?

[C.H.O.A.M.]

This old Superman has been restrung with a 30+ year old rubber band.
He's a little loosey goosey but he's hangin' in there.
Years ago I added some masking tape muscles. Now I've peeled it off and it's still sticky in spots.
Any advice?
Should I leave it exposed to the air, or try some soap and water?
Rubbing alcohol?
Degreaser?
Spray it with some dull coat?

[RG]

joy dish soap ... warm water and let the guy soak in it over night

then repete and use a fingernail scrub brush or old tooth brush etc. and scrub him while still under the soapy water bath

[RG]

oh and it might not hurt to pop his head off so when you get to scrubbing you don't mess with the paint at all