If you see yellow/brown colored spots
on your car's white or silver colored paint, do not be alarmed. It's a
common issue that requires attention but it's easily fixable.
You may think there
is a defect in your paint's finish but it's actually rust. The rust is
due to very small pieces of metal shavings that have embedded themselves in
your car's paint. These metal shavings are called railhead dust because they
come from metal shavings that are a result of train car wheels running
across railroad tracks. The metal shavings float in the air and then land on
your car's paint finish. Eventually they rust and the result is the brown
spots you see on your paint. These small metal particulates also come from
the use of metallic brake pads and rotors.
Many cars have this issue but may not be
visible unless it's a light colored car - especially white. The issue can
easily be fixed and should be done as soon as possible.
What You'll Need:
The issue can easily be fixed with a clay bar. Detailing clay is a mixture of resin and polishing abrasives. It's not regular earth clay so don't think you can save money and head to your local arts and crafts store! Detailing clay can remove what paint polish can't - such as railhead dust, paint
overspray and dried sap.
First, remove your clay bar from it's packaging and knead it with the palm of your hand to make it more malleable. Then form it so that you have a nice flat surface. Set aside for use in step 2. ALWAYS keep the clay on a clean surface when not handling. If you drop it on the ground, it is considered useless and you must throw it away. Do not use or you will scratch your car's paint finish.
With your car in the shade so that the paint finish is cool to the touch,
wash your car using either Exclusiv Gloss Shampoo or Perls Shampoo to remove any loose dirt and contaminants then rinse the car as normal.
With your car still wet, apply Spray Wax on the surface to be treated for lubricity. Take the clay bar and without any pressure, gently glide it along the surface of the paint finish. Apply Spray Wax and water to the surface as needed so the surface is slick. If the clay sticks to the paint while you apply it across the surface, apply Spray Wax. Do not drag the clay or it will scratch the surface.
As the clay pulls up contaminants, be sure to re-knead to expose a fresh, clean side. Continue the process until you've finished the car.
Rinse the paint finish with clear water and dry with a lint-free towel such as our waffle weave microfiber towel.
It's impossible to prevent railhead dust from contaminating your paint so you'll want to clay your car at least once a year. If you don't have a white car that makes seeing raiheadl dust easier, you can check your paint by using the bag test. Place your hand in a
regular plastic sandwich bag. You can also place a piece of cellophane between your hands and the paint. Whichever one you use, make sure it's clean. Now, on a washed and dried paint finish, run your
hand across the surface. If it feels rough, the finish needs to be treated with clay. If not, you can hold off - the paint isn't contaminated.
It's that simple. The plastic bag has a way of enhancing your sense of touch to reveal the true condition
of the paint that bare hands can't determine.
For best results, polish and wax your car after you have clayed it. This remove ALL paint contaminants for the smoothest and best finish possible. Apply Glanz Wax to seal those results in and protect the finish.
If you have any questions,