The RS96 plate was made in multiple colours, right? I think your best best is to swap it with someone else for another colour.
The only way to remove anodizing is to sand it off, and that can be very difficult for the edges.
The only way to make the edges not red would be to paint. You would have to paint with aluminium-etching primer right after sanding is done otherwise the aluminium will have time to oxidise and not allow the primer to get a grip ... but you can't possibly sand all the small edges in time for that (unless you are sandblasting with the perfect pressure and grit for this application), so you would have to settle for primer sticking well to the surface only. You should use sandpaper glued to a perfectly planar surface in order to avoid rounding off edges.
Also, be sure to not introduce any oils to the surface in the process - your fingers have natural oilks.
Also, after paint, snap the switches in only once - permanently, because you will otherwise chip the paint every time you unsnap a switch.