That CLR, it's been here for well over 20 yrs unopened. I wouldn't let the ex use it, after hearing feedback on what it can do to drains .. I thought it had been taken off the market.
Then people started showing pic of what they have done to old cars ( rusty cars) to bring back whats left of the original paint job..
welp my acid was gone, so out came the CLR, of course outside, I'm use to using acid which will clean any rust off in minutes, yes burn holes in skin.
anyway plastic bucket a old streamer pan for parts and the water hose.