Would MI paste scratch the plastic of Invisalign aligner/retainer?

MI paste looks promising as a means to re-mineralize the teeth. It contains , among other things, silicon dioxide and titanium dioxide. From what I gather, it is generally not advised to use an abrasive toothpaste to clean the invisalign tray, as it will scratch the plastic surface and hence promote bacterial growth. Some told me that it is a good way to apply MI paste like this: apply the MI paste on the teeth, and then put the invisalign tray / retainer back on. Would this scratch the tray / retainer?