A pressure washer loaded with a gentle cleaning solution should do the trick.
How to remove oxidation from metal garage door.
Dawn tide and warm water.
Step 3 spray the surface of the metal door with the soapy mixture or tsp.
Place an old towel large rag or layer of newspaper at the bottom of the door to catch drips from the cleaning solution.
Clean the garage door with ez prep cleaner and water.
Ketchup helps oxidizes rust and tarnish eating through them so that the underneath metal looks new again.
Rinse until water sheets off of the door and no bubbles remain.
Remove all chalk and oxidation wiping with a rag if necessary.
Using a clean bucket mix a small amount of dish soap or car wash soap preferred with water with a soft sponge or cloth apply the soap to the door in a circular motion rinse off with garden hose for steel or fiberglass doors apply a light coat of spray car wax.
Pressure wash according to proper guidelines and let the solution stay on the wall for up to 15 minutes before removing it.
Spray your door with water and then squirt it with ketchup.
Roughen the surface of the metal garage door with a hand sander and medium grit sandpaper.
Jim mc namara 2003 06 24 18 34 20 utc.
If the garage door was installed in the past 2 years then you will want to be sure you remove any wax remaining on the door from the factory.
Exterior surfaces can take up to a full day to dry.
Do not use harsh or abrasive detergents.
Sand the entire door not just the oxidized areas to help the primer stick to the door.
Rinse at between 1500 and 2000 psi.
Does anyone not of a mixture that can be sprayed on to remove the oxidation without harming the factory paint.
Rinse well and let dry.
The garage doors are structually in great shape but there is a thin film of chaulky oxidation on the outside doors.
This can damage the painted surface of the door or the seals.
Begin at the top of the door and allow the spray to run down the door.
Wash the door surfaces and windows of your garage with a mild liquid soap such as a car washing soap or dish washing soap and water.
Work the ketchup around the door focusing in on the rusted spots and allow it to sit for 10 minutes before wiping it clean.