Not sure why that made any difference as logically the amount of the Superman suit/himself covered would have made the powers less accordingly...
Hmmm... Maybe he was allergic to the chemical in the business suit, and contact with any of the allergen at all (directly or through the Superman suit) was sufficient to cause a reaction which blocked his solar processing?
I think that that's the best rationale I can come up with for that bit of silliness.
then again this is Silver Age Superman so logic was sometimes left by the wayside.
Why let a little thing like logic ruin a good story?
Joy,
Lynn
