Yaris Rust Repair Questions

[GrayYaris]

Hi Guys-

My right rear fender is starting to rust and some of the paint is bubbling. Since I live in the "salt belt" (upstate ny), I wanted to address this before the winter. Let me know if any one with body repair experience has suggestions for fixing this.

My plans are to grind the rust away, revealing a clean surface, spraying with rust inhibitor, fill in with body filler, spray with primer, and then finally spray with a can of 1FB paint (my code).

I do not own a welder and have no experience welding so that method is out the question. I don't feel that the rust is horrible, I just want a repair that will last a while and prevent my fender from rotting.

My specific questions:
1) What is the best (and affordable tool) to use to clean off the rust and old paint with? (I own an electric angle grinder and a small air compressor if there is an accessory for those)

2) Any suggestions on where to buy the Toyota paint cans? How about the type of filler I should use?

3) Any special tips for the novice hack?

Thanks dudes!