cleaning carbon off pistons

Hey, guys was wondering what cheap and effective ways of cleaning carbon on pistions? i was thinking of using good old gas and a tooth brush what has worked for you
A metal coffee can and mineral spirits worked well on my 383 Mag in 1991. I used carb cleaner on my Ironhead Harley and a toothbrush... in my living room. Forged Manley Pistons.. runs in the 7s in the 8 th... but the smell in the living room....