I use Pledge.

Both my active bikes are clear coated with fairly tough paint. After a wash with highly diluted 'dish' soap, I 'blow-dry' the bike by riding it around the block 'real fast' followed by a thorough wipe down. Then -- I simply spray the bike with Pledge, being careful to avoid the brake parts and then wipe it down with old T-shirts.

It works. It's quick, shiny and lasts for some time. Pledge also seems to lower the amount of schmutz that sticks to the parts.

Joe