I remember visiting Shooter's garden. John had a 2x4 frame "table" at kitchen counter height for dividing. The neat thing was, the top was covered with either chicken wire or hardware cloth, allowing the water and dirt to flow through. I have wanted one like it ever since!
I have known about the Comet cleanser for so long! I can't remember who i learned this trick from. I think any powder cleaner that has chlorine in it would work. I keep the can out in the garden shed with all the other stuff. Been using the same can for years!