Abrasive blasting respirator

[B5 Charger]

I have been using a benchtop blasting cabinet for a few years now.  I use glass bead or aluminum oxide to blast parts with it.  I also use to use a portable blaster with play sand or silica sand to blast other bigger parts until a couple of years ago when I got freaked out reading about Silicosis.  My question is this...What type of respirator should I wear when using my cabinet.  It has a good seal but there is still some dust involved in the whole blasting process.  Since my face is right over it I want to protect my lungs.  I wear a two cartridge respirator to keep from breathing the dust but now I read that my mask isn't good for any type of abrasive blasting not just sand or silica.  Is there a respirator good for abrasive blasting other than the closed air SCBA type?  Or should I even be worried about this since I'm not using a silica based media anymore?  I'd rather not be killed restoring my car.  Any suggestions?

[Silver R/T]

half mask should be adequate for blasting, charcoal filtered one