Aero 1?  Isn't that the fuel additive?  Do you mean the zinc stearate?  I do use it more and more than talc and a very, very thin coat on the open bays.  But sanding them is a tedious chore for me. I hate it when I cut through the covering at the rib edge (actually cap strip edge) but it happens.  I find using 0000 steel wool makes this part easier and does a fine job.