Don, the man that does glass etching and I do think other issues, has mentioned that it is dependent upon the how thick the "skin" is and the sort of and depth from the etching.That you could "scratch the surface", although the further the more of the alter that the https://showerdoorsforshower93691.blog-a-story.com/15211530/an-unbiased-view-of-glass-shower-door