Aluminun turning question

I'm going to turn some aluminum for a dash panel. I'm going to use a felt pad and some lapping compound. couple of questions:

1. should I polish the aluminum first or can I just have at it as is? It's clean, but not shiny.

2. should I cut the panel first or turn it first. We're talking about gauge and switch holes too.

3. Any tips or tricks for keeping the pattern consistent? I plan to use my drill press.

Muchos gracias

 

Check out these two threads. I think these will answer your questions.

http://www.jalopyjournal.com/forum/showthread.php?t=36927&highlight=chaz

http://www.jalopyjournal.com/forum/showthread.php?t=52932&highlight=engine+turning

 

Perfect! Being just a FNG, I didn't find those in a search. Thanks muchos!