I don't know if you have used this type of stripper but i have one similar, its dark grey or charcoal in color, and a 3" dia, i think it works super on taking paint off of sheet metal, i think i got mine at Ace hardware..
https://www.amazon.com/Pack-Black-Ro...ing+disc&psc=1
I also have one on my 4.5" grinder but its super agressive.