Mirror cleaning fluids

Well, I tried the MEK on the stuff that is on my mirror and it did not touch it. This stuff must be something exceptionally hard. MEK, Acetone and Pure Alcohol have not dissolved it. Water and soap have no effect either, so I guess I am stuck with it until the next coating is done. I suspect it is an over spray of something, just not sure what it could be that this stuff would not remove.
Floyd

I had a similar problem only it was on a lens not a mirror... I tried all the standard formulas to no avail including acetone.. Since it was a lens I tried windex as a last resort.. It worked....but it really streaked bad so I had to go over it afterward with acetone..

The only thing is I've heard you can't use windex on a mirror ( not sure why )..

Did you try just soaking it over night in soap and water??

Mark Visser