I heard that even a paint correction will remove this coating (i.e. DA polishing). Seems like a high price for something that will come off when I do a paint correction.
Paint correction is done as part of the prep work.
Once done properly, it shouldn't need doing again. Obviously it would take this finish off as in its nature it takes some of the paint top layer/clearcoat off to create a surface as flat as possible.
I guess if it does need doing again, that's what the lifetime warranty is for. I figured if I don't need to polish the thing again for a few years, and it makes cleaning an easier job, it's worth it.