What’s safer: 2 bucket method or power washer?

[Accumulator]

... I also like gt08vapor use a bucket to rinse the mitt intermittently and even foam the mitt before using it...

I fill the mitt with either shampoo mix from the wash bucket or with foamgun, output and hold it shut at the cuff rather then wearing it like a glove.

[Barry Theal]

When I do a wash, I pressure wash everything first to remove as much loose debries as possible. Then I use my foam cannon and let it dwell, The rinse with a pressure washer. Then I foam it again and use my flushing technique with one bucket as a rinse. Works like a charm!