I'm no professional haha. The only reason I did this car was because I was tired of seeing the 240 in as bad of condition as it was. TONS of tree sap and really neglected paintwork. Spent about 3 hours on it, and it's not too shabby for 21 year old paint. It's still got some non-repairable paint damage in some areas, but it looks much better.
If you want my pointer though:
Wash with microfiber towels, use dish soap, not car soap, it's a stronger detergent, and it will clean better, the downside is the detergents will also eat off old wax.
Then use 91% Isopropil Rubbing Alcohol for tough tar, grease, oil and grime, wipe in small circles with a microfiber towel until the blemish lifts then rinse with water as you do not want the alcohol to sit on the clearcoat for a long period of time.
Then use a spray on detailer with a claybar (they come in kits together) and rub the clay in the same direction that the wind flows over the car. Do small 5 or 6 inch square areas at a time. The clay will get easier and easier to move across the surface until there isbasically no resistance. When it gets to that point, move on until the whole car is done. Kneed the clay to expose clean clay as needed.
Wax at the end with a round wax applicator and rub in very tight circles. the tigheter and more overlapping the circles, the better the wax will be applied, but the longer the car will take, so find a comfortable median. Then, allow the wax to dry (not in direct sunlight) and rub it off.
Stand back, and enjoy
