Washing is a very important aspect of exterior vehicle care. There are many myths out there and I will try to set things straight. The purpose of washing is to remove loose contaminants from the paint that if ignored would eventually damage the finish. During the wash process it is a good time to do some light detailing such as removing road tar, bugs, and to thoroughly clean the tires and rims.
Start with a vehicle that is cool to the touch. Never wash your vehicle in direct sun light especially on a hot day. The hot sheet metal will cause the water to dry and may leave water spots on your finish. Also products such as degreasers work more aggressive when hot and may do damage to your vehicle. This usually means washing it in the morning, evening or under a shady tree. I as a professional detailer set up a portable canopy to provide shade and to cool the vehicle down. I also use 100% deionized (D.I.) water that dries spot free.
Gather all of all of the things you will need such as a 2 large buckets, two wash mitts, a pH balanced car wash soap, a bug sponge, chamois, and an assortment of safe specialized cleaning products for areas such as the wheels, wheel wells and grill area. Don’t for get your specialized brushes and other tools.
Next pre-treat the tires, rims, grill area, and rocker panels with the appropriate cleaner to soften or dissolve the tar, grime and/or bugs. Now rinse your vehicle with a cool stream of water to rinse off the dirt. Now is the time to scrub the pre-treated areas with your bug sponge and /or brushes. By now you should have prepped your wash bucket with the correct type and amount of soap (follow the instructions on the bottle). Use the second bucket as a rinse buck that only contains clean water. Dip a large fluffy wash mitt into the soapy water and starting from the top thoroughly wash the vehicle using light pressure. The idea here is to give your vehicle a thorough wash without scratching it. Dip your wash mitt offten into the clear water bucket to rinse out dirt from the mitt. Use the second “grunge” wash mitt to wash the wheels and wheel wells, rocker panels, and any other very dirty areas. If it is very hot out, do one section at a time and immediately rinse it tokeep the soap from drying ont he finish. Once the vehicle has been soaped down rinse the whole vehicle.
Use a chamois to dry the vehicle. I have been using a high quality synthetic chamois for years now and they work great. Go over all areas and don’t forget to open the trunk and door to dry the jams. At this point I go over my washed vehicle and check for any missed areas. If everything looks good you finish up by cleaning the windows, dressing the trim and tires and vacuuming the inside.