I was told (on my foundation course) that it was unlikely that products in themselves would damage any part of the nail but to be careful around the lunula and cuticle area when using products but more for over exposure reasons than anything else (and trauma in the case of the lunula).
I don't know whether lunula damage was to blame for this, but on my thumbnails the lunulas are quite large. When I had nail enhancements the very first time, I noticed that when they were removed I had a big horizontal ridge on my thumbnails, but not on any other nails. The enhancements had felt tight (if you know what I mean) cos the lady who had applied them had put a really curvy tip on my really flat thumbnail! Anyway the ridge eventually grew out but to my knowledge I hadn't damaged my nails in any other way prior to the enhancements. I'd be interested if anybody else knew if this could have been the case.