Finish your metal - Lessons learned

I'm doing a lot of research to better understand what are the finishing options for different types of steel. After making quite a few mistakes, the progress is coming along nicely with the finishing.

I am using a Walter Flap Disc (that is attached to an angle grinder) to smooth out the welds & polish up the metal. I didn't realize this until I had already purchased them, but these flap discs are really a grinding wheel + sanding wheel all in one. They were created to help eliminate two steps and I'm very happy with the 60 grit Walter Flap Disc that I'm using.

I will be testing out a 120 grit Flap Disc this week and will put up some photos to demonstrate some of the differences.

Also, in what may be just my own perception, is that finishing the cold rolled plate is a lot more work than the hot rolled (milder) steel. I practically went through a DeWalt flap disc trying to get some shine on the cold rolled plate. It could just be me but the grinder was working extra hard on the cold rolled material.

Here is a good article from Lehigh Valley Abrasives