Nice, but those are still mining missions and it's rather unreliable.You can get it as a mission reward too!
Metal rich contains no Platinum.Mine from a metal rich ring. You should find some fairly quickly.
You don't need any prospectors. You are better off with them though.you need prospector drones.
This works really well, especially when you already have an SRV with you and can't be bothered to refit and travel for mining.if you only need a few tons, going for surface pois (blue curcles) is a good source - you'll often find bases with some t of platinum.
Can anyone give me a guide (or a link to) to finding Platinum. I know it needs to be mined but it is probably rare and difficult to find. Would appreciate some help.