Just for the hell of it I bought one of these - https://www.bestdryingrack.com/washing/bucket-plunger-washer.html I put the filthiest pair of jeans I had in the bucket. They were blackened pretty good from auto grease and forge works. Added some water and detergent and gave it maybe three minutes of plunging and holy shit the water turned black. Poured the water out, added fresh water, plunged another couple minutes until water was a light grey. Dumped it out, added fresh water again and plunged another minute or so and to my surprise the water remained clear. Pulled them out, hand rung the water out and hung to dry. Once dry I inspected. Not a sign of grease or black coal smudge anywhere. A little stiff as air dried clothes tend to be, but I gotta say that worked incredibly well with very little effort. I would buy a ringer and three small wash tubs (one soapy and two for rinse) if’n I were or had to make it a regular thing. No shit, it was pretty impressive.