I kinda gotta agree with homie....
Bust that shit open and see or at least call the company, use your head.
I just got off the phone with sherwin williams/KRYLON. most of there cans use marbles. They do use metal bearings in a few products but she would not disclose which ones. Safe to say your magnets are not going to work. As for ( Rusto, Painters touch, american accent = all the same shit) they cant be silenced. As far as the rattling in your bag get tighter fitting bag or sock your cans. So whoever said most american paint uses glass is 100% correct.
Montanas and beltons and alot of these newer companies are run by innovative writers or people that actually care what there customers want. So to answer the question to the topic of this thread yes montana and belton use Metal berrings. Montana makes silencers with a quite powerful magnet but they only fit montanas and duplicolors. the magnets for those silencerswork on beltons if there disconnected. Im working on a silencer for belton we'll see what happens.
Duplicolor auto engine paints use metal bearings in a bunch of there products from what i hear. rumor is they make a fake montana product ( i dont know if its true) but could explain why they use the metal instead. Ive uce silencers on the Chevy orange and grabber green, but seriously who would bomb with those colors anyhow.
I think this was probably won of the best ideas going so the balls dont rattle when your walking down the street or there people on the other side of the freight or wall whatever. kudos to the wizkids that invented these...goodlooking out for everyone.
If anyone have a good magnet source maybe PM me. Those silencers can be pricy if you dont have a hookup!
That should answer every question...