10-01-2012, 03:52 PM
Location: San Jose, CA
Join Date: Nov 2011
Mein Auto: BMW 528i
I've had a similar thing happen to my car after it was parked under a tree for an afternoon.
The tree shed tiny droplets of sap onto the vehicle, which would not come out with regular washing. The droplets were hardly visible, though the the paint felt rough.
As others have wisely suggested, get yourself some quick detailer to use as lube, and use a fine to medium clay bar. If I could only choose 1 clay bar, I'd go with the medium, as it removes more contamination - but may slightly mar. Marring can be removed with a good polish like Meguiars M205 (either by DA polisher or by hand). Make sure to use good microfiber towels for these processes.
How-To Clay (Courtesy of Detailed Image)
Step 1: Wash and dry your vehicle.
Step 2: Break off a small piece of clay that you will be working with and shape it into a flat surface.
Step 3: Working in small 18" x 18" sections, mist the clay bar lubricant over your working area, so that every square inch is covered in clay lube.
Step 4: Gently glide the clay bar over your working area using overlapping passes going left to right or up and down. Note: You do not want to rely on a lot of downward force to clean the paint. You should allow the clay to absorb the contamination. Stubborn contamination can require a good amount of time, clay lube and passes to remove.
Step 5: Continue working on an area until all contamination is removed. You can tell this has happened because the clay will slide effortlessly across the paint and you will not hear any contamination being picked up by the clay.
Step 6: Wipe off the excess clay lube with a microfiber towel.
Step 7: Continue steps 3 - 6 until the entire car has been properly clayed
Note: Reshape your piece of clay after each section so that there is a clean fresh surface exposed. If you cannot reveal a fresh surface, break off a new piece of clay. To increase the life of your clay bar, spray the bar with a clay lube and store it in a clay bar storage container.
If you drop a piece of clay, throw it away!
Working on a small area ensures that your clay lube will not dry up too fast.
Do not use too much pressure when gliding a clay bar across the lubricated surface.
Using a quick detailer that leaves behind a slick surface is often good as a clay bar lubricant
For most vehicles, we recommend using a fine grade clay bar.
A medium grade clay bar will almost always leave behind some marring that needs to be polished to remove.
Optimum No Rinse mixed with water is a common clay bar lubricant amongst professionals.
You can often tell if there is contamination still on the surface by listening closely as your clay.
Avoid using a clay bar in direct sunlight so that your clay lube does not dry up quickly
Cutting your clay bar into small pieces helps preserve your clay in the event you drop a piece.
Always try to reshape your clay to expose a fresh, clean piece of clay
When storing your clay bar, mist some of your clay lube in the bag or container to keep is soft and flexible.
It's good practice to re-wash your vehicle after using a clay bar to remove any loosened contamination and to remove excess clay bar residue
Clay not only works well on your paint, but also your glass, wheels, plastics and other surfaces