My apologies; I wasn't being clear. I'm thinking about cosmetic covering for your acoustic foam. Will contact paper (easiest) or muslin (possible, but tricker) affect the performance of the acoustic foam?
Also, since thicker is more expensive, is there any way to estimate what thickness of the foam is enough?
And, I had eye's on the foam before, (not the "cone" type, just the the flat stuff), but now I can't locate in on your site. Any pointers on where to find it would be appreciated.
Thanks!