You can use high temp clear, they have it at Pep Boys, Checkers or Auto Zone. It flashes pretty fast, so you can put a lot of light coats on and have it come out sweet! I clear coated my polished UIM this way and am very happy with it!
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone