Spotting/blemishes in general occur on all RCM coins (pre-2018), just more common on bullion. I own some older RCM collectible coins but haven't experienced any spotting (the last time I checked). If you look online on other forums you will see people talk about blemishes on their non-bullion RCM coins. Here's one example from another site that I kept because it was an interesting story if you haven't read it before:
5 kg Silver
Here's another (slightly older) thread where they talk about it and show some pictures if you are interested:
RCM Milk spots
The mint's shield technology doesn't seem to have anyone complaining loudly about it still occurring, but I can't speak for myself.
5 kg Silver
Here's another (slightly older) thread where they talk about it and show some pictures if you are interested:
RCM Milk spots
The mint's shield technology doesn't seem to have anyone complaining loudly about it still occurring, but I can't speak for myself.
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