Rustproofing Treatments
Did you know that to assure optimal rust proofing protection, we need to drill a small number of holes in the body of your vehicle? Rest assured, the drilled holes are completely safe for your vehicle and drilled by expert technicians, who know all the different model specifications. The drilling locations vary from one model to another.
Rustproofing - Piercing 
Why pierce holes in your vehicle?
To treat it everywhere.
Yes, our experts pierce 3 or 4 small holes (each measuring 1 1/2 inches in diameter) at strategic spots in a car or truck that is getting a first treatment. Why? Because these openings allow rust proofing to cover metal surfaces or parts that are otherwise inaccessible.
This prevents rust from forming in areas that are closed, and where moisture can still get trapped. The worst type of corrosion, which forms on the inside of your vehicle, will no longer be able to settle. And don’t worry:
The piercing is not only safe for your car; it will also help raise its resale value. A vehicle treated every year by Metropolitan Rust Proofing will not rust. It has the best chance to remain in good condition for many years.
After the first treatment each hole is coated with rust proofing, and then covered with a black cap.
During the following treatments, we no longer need to pierce holes. We remove the caps from the holes pierced during your first visit and replace them once we have used that opening to inject a new coat of rust proofing.
Where are the holes pierced?
In the rocker panels and doors. These parts of your vehicle are particularly vulnerable to rust due to their design and their location.
Also, during the assembly of the rocker panels and doors, many of the internal metal parts are folded. This can damage the original rust proofing where the metal has been folded. In addition, the friction caused by opening and closing the doors creates wear…places where rust loves to settle on worn metal!
Winter ice and deposits of mud or calcium thrown by the wheels in winter can cause condensation, enclosing humidity in small spaces. Water can accumulate easily in the rocker panels and doors.
Where we pierce:
- The rocker panels, only two holes in 2-door models, and 3 in 4-door models;
- The doors, a single hole.
