I did use my sander on the bottom of my cast iron pans before I used them on our glass cook top to get them nice and smooth.
What I use for burnt on sugary stuff (Homebrewing beer) is something called PBW (Powdered Brewery wash). There are a number of 'recipes' for home made versions of this out on the web using Oxy type cleaners and TSP substitutes.
Programmer - An organism that turns coffee into software.
If all your friends are exactly like you, What an un-interesting life it must be.
"A door is what a dog is perpetually on the wrong side of" Ogden Nash