I think one of popeyes biggest feats was to repel an alien armada, but he only accomplished because he ate a field of spinachs.
Now, popeye can transmute objects like a tiger into a leoperd rug, but supermans molecular density and resistence is not qual to that of a leopard in comic book logic, now this is sundipped superman.
It comes down to how much spinach popeye has ate vs how much time superman sundipped and one can of spinach vs sundipped superman is not going to be enough, imo.