Join Date: Apr 2006
Location: Sharpsburg, GA
I used to do this on my old Esprit every year before I put it into winter storage. To cut the dirt and grime, get an empty trigger spray bottle, buy a gallon of mineral spirits (oil base paint thinner), fill the bottle and use it to spray down the grungy parts. Let it sit for awhile and use paper shop rags and/or a brush to clean it off. Once all the heavy stuff is removed, get another spray bottle, fill it with bulk WD-40 and spray down the whole underside of the chassis. Wipe off the WD-40 and dirt mix with another rag and then spray another coating of WD-40 onto the chassis. You can then wipe that off or just leave it there as a protective film. Just remember when you are done to dispose of the shop rags in a fire proof waste can or leave them outside to allow the mineral spirits and WD-40 to dissipate before you throw them away (oily rags in a closed container can spontaneously combust). I learned this method for cleaning the undersides of vehicles from an airplane mechanic who used it to clean the bellys of painted and unpainted airplanes and I am still using it on my present Elise. It does a great job of cleaning the chassis as well as dispersing any water on it to prevent corrosion.