As others have already mentioned, the Tripoli and White Diamond polishing compounds that come with the Beal System may not be the best to use when buffing poly. I recommend using a plastic polish. You can also use the polishes made for buffing automotive finishes. Here are some additional suggestions:

1. Use a clean, soft, buffing wheel. A wheel loaded up with other buffing compounds may be more aggressive than you want for buffing poly or lacquer. It's best to have a separate wheel for each compound. A 'stiff' wheel may also be more aggressive than you want.

2. Turn the speed down. As with sanding, heat is your enemy when buffing poly and lacquer. Heat will soften the film finish, which may lead to streaking. Light pressure and a lower speed will give better results.