Our V20 aquisition!!

[nipper]

If you are not using a power washer, you ought to give it a try. I have found that a power washer alone, without any scrubbing or detergent, will knock off most of the crud and then you can give it a good scrubbing with a moderately stiff brush and a cleanser. I have found lots of stuff works well for cleaning, including softscrub type products, products with bleach, and even the good old scrubbing bubble type spray on bathroom cleaner.