Thought he was asking snows specific questions, thats why I didn't answer 1 and 4. For #4 You might try Blue Buster I think it is, that one comes with a drill attachment saving quite a bit of elbow grease. That being said I have used both Blue Away and Blue Job and both work just fine. Blue Away will leave very fine scratches but not enough to notice 2' away.

+1 on #1 and #3 above in Ramsounds post.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!