Can Paillier ,RSA or any other schemes be used for universal re-encryption like elGamal?
With Paillier, it's easy; generate a random encryption of 0 ($r^n \bmod n^2$ for random $r$ r.p to $n$), and then homomorphically add it to the encryption (that is, $C2 = C1 \cdot r^n \bmod n^2$), and you're done (and all you need is the public key).

I don't believe RSA allows this as a possibility...