yea, I used the engraving bit. It worked just fine....since I had a lot of surface area, it took a looooong time, but oh well. And taking off plastic is what you want to do. Don't dig into the plastic. All you really want to do is shave a bit off the surface. Let the dremel do the work. Just go over it lightly. If you want it to catch more light, then you can go deeper. But you dont want a huge gaping hole or anything, you just want to rough up the surface.
One of the stickys in this section is the "Dremel Guide"....look at that and click on the "Window Etching" link. I used exactly what was perscribed, except I used the dremel alone, without the flexshaft. I'm scared of that thing. The manual says dont bend it too much or it'll break or melt or something, and everytime I use it I'm afraid to bend the damn thing.....that, and the shaft REALLY gets in the way....so I just use the dremel straight up.
A tip about etching:
I find it helps if you have a light source nearby such as a hand-held shop light or something. Once you get going on a large area, it's difficult to tell the little tiny spots that you missed, so its good to have a light around. The missed spots will reflect the light and stand out like a sore thumb against the dull areas around it....but you need a bright, nearby light source to do this. The reason you want a hand-held light is so you can move it around. You need to position the light at different angles to get every spot.
