Best way to smooth down cut aluminium edge

[joxang]

So after cutting out a case window panel in an aluminium (Lian Li) case, what's the best way of smoothing down the cut edges?

I've used some medium grade files but the edge isn't as smooth as I'd like. I've heard of diamond files, but would something like sandpaper or a dremel attachment be better?

 

[Zero82z]

Fine grit sandpaper would work. The finer the grit, the smoother the finish, though finer grit paper wears more quickly and removes less material.

 

[Chevy-SS]

Dremel attachment would be too hard to control - you'd never get a smooth edge.

I'd use something like 300 grit wet-or-dry paper, or a fine file...........

 

[Shadowspawn]

Coarse file -> fine file -> sandpaper.

You can do it with various Dremel bits as well.

 

[joxang]

Got a nice finish with a sanding block. Cheers !