I used a SMALL pressure washer that was just set to spray, not jet the water out. I applied the TSP by putting it in the washer. Otherwise your plan sounds exactly like the steps I used. I hope you got better gloves though, it took about a week for the stuff to peel off my hands. I read more about graphics since I did the job and I should not have used the BKF abrasive powder on them. Mine bled even with a plain water rag though so I don't think it made that much difference. Post before and after pics if you can! I'll be interested in how the stripper works on any drips and if you can re-coat an area so that it blends with the rest of the finish--also if you use it on the metal.