http://www.cookwarediary.com/using-c...ass-top-stove/
https://www.quora.com/Is-it-okay-to-...atch-the-glass
https://www.facebook.com/LodgeCastIr...type=1&theater
https://www.hunker.com/12498609/why-...ass-top-stoves
It seems u can, especially w enameled exterior castiron. With regular u have to polish or to be careful not to slide it on the glass - even lodge on fb says don't slide it on the surface.
The gaggenau cooktop is kinda cool. U put a round control magnet and spin it to control the heating pads.
I kinda like it so want to keep scratch free as long as I can.