Lyman tumbler media

[Two Rivers Marshal]

Need a bit of advice.  Bought a new jug of media the other day.  Was looking for regular crushed walnut but everyone was out.  Ended up buying what was labeled tuffnut by Lyman.  This is walnut with a rouge added for polishing.  Figured this should work out well as I'm one of those that like to have my brass nice and clean. 

Got home and dropped about 100 45 casings in and let er go for a few hours.  When I opened the lid, the brass looked almost better than new brass.

Now for the question....(kinda long winded aint I)  there is alot of the red residue left inside the cases from the polishing rouge.  I swabbed them out with some q-tips.  There still is a "coating" of the rouge inside the casing.  Will this coating cause problems and contaminate the powder if I load em up?  Do I need to find something and wash the casings?  If this is going to cause a problem, might have to get rid of it, or wait to clean the rest until I can get regular old walnut and maybe mix with 25% rouge media.  Thoughts / opinions?

Appreciate the help in advance

TRM