That’s a cool idea, thanks, but it turns out the hydrofluric does the job after all. I was assuming it wouldn’t, as it was doing nothing for my auto walls (which I was assuming were covered in the same grime as the machine), but I tried it today and it brings the white back really well and without too much elbow grease. I’ll post a pic tomorrow if I remember.What about having it vinyl/ wrapped if cleaning is not effective? I think you could make it look cool,