I have a numbers matching 400 vert in great shape. It has a lot of road grime underneath including engine and front suspention after 100k miles. What is the best way to clean all this up short of removing the sub frame? In the old days there was steam cleaning which did a great job. Is this an option these days? Other suggestions? Also, it has a great top on it but the rear plastic window is dark. I have not tried to clean it because I did not want to damage it. Is it salvagable or do I need to replace it?
Thx
MrE