With these pictures you should be able to replicate anything I do pretty fast. I spent a long time thinking about what I was doing when I first did it to the left side. Then when I got to the right side I was able to really speed things up and get crazy. It took me about 4 minutes to outline and chop out the whole fender with the cutoff wheel on the little grinder. Hold onto that thing tight when you get close to the corners!
I have a lot of time and experience using these grinders and I always wear thick long sleeved shirts and gloves. If you don't you'll be miserable. Just grab some crap denim clothes for your steel working outfit. And I recommend buying one of those skull caps from the welding supply store to keep grindings and sparks out of your hair... because you WILL feel that stuff going right to your head.