Any balls I bought from a few USA companies over the last few years and a Aussie seller from Melbourne had a light machine grease in the bag of balls.
As soon as the grease was polished off and the balls were given a few dozen games, the balls were starting to pit n rust very quickly.
I am in the process of organising to replace every ball in every machine I have with new balls and will contact mike cause the order will be 50 x 3, 4 or 5 balls per machine etc.
All the balls in my machines are either original balls from donkeys years ago or 3 or more years old.
Time for a complete swap out.
Mikes the man for a big custom order of 250 balls etc.
Even with shipping from China it will kill any quote from the USA and supporting Mike is something I feel is important for the Aussie pinball hobby.