I have a detailing business in Santiago, Chile. I'm working with
Meguiars, and I'm pretty new to interior detailing...
Anyway, I have a customer who brought in a boat. The vinyl seats used to be white! They are now brown..ish... I used
Meguiars Quick Interior detailer to try to get the stains out, but to no avail.

I'm in need of some advice. Does anyone know of any other way to clean white vinyl? I talked to a friend of mine here who cleans interiors at dealerships, and I have a meeting with him first thing in the morning to see what we can do. One major disadvantage that I have here in Chile is I can't "run down to the parts store" and pick up any old product. Are there any household cleaners I could use? We do have eco-lab here, but that's as good as it gets, and we do not yet have Meguiars professional line, so that's not an option.
Any advice would be greatly appreciated, and I will try to snap a couple of shots of the interior in question so you can see for yourself what it is I'm working with...