Need Detailing / Cleaning Advice

[coreseller]

First off thanks to FatMike for pointing me towards the uber brush attachment for my PC Polisher, it really works well. I can't believe how effective the "Magic Eraser" works on the tan interior plastics either, wow!! I'm digging further into this Miata (I originally wanted something rough, I knew this would happen lol) and after completing the paint resto I'm getting to work on the interior and top. My question; after using the brush and some warm water / Simple green on the top there are still some darker marks which may or may not come out. I have the Ragtop Cleaner and Treatment that I am going to use when it warms up but any suggestions on whether or not some of the darker spots on the top will come out? i don't want to get too aggressive and do more damage than good, Thanks Guys......Mark.