Rub it into the galvanised surface until the paint begins to thin.
How to remove paint from galvanised garage door.
Fill a bucket with the hot water and several drops of the dish detergent.
First you need to give the metal doors a really good scrub with soapy water and a clean cloth.
Homestrip p v remover would certainly be the safest way to remove it.
Dampen the cloth with white vinegar and scrub down the entire surface of the garage door.
Here s the link to the projects page on home strip and there is a link to purchase in the tool store.
Clean the garage door s surface with a water based cleaner and a sponge.
Maybe screw some sheet metal to the wood sides of the door to prevent taking the paint off your wood too.
Then degrease the door with sugar soap and allow to dry.
Wipe down the steel garage doors to remove the dust and debris.
You want the water to be soapy.
This will allow the paint to adhere more readily to the metal.
Rinse the excess paint with a wet cleaning cloth or sponge.
Remove all stains from the doors as they may alter the color of the finished paint.
I ve never stripped the paint off a garage door before but i d think that would be a good application for a pressure washer.
Using a heat gun outdoors is like trying to staple jello to a tree.
After scrubbing the entire surface wipe with a clean cloth to remove any residue that may remain from cleaning.
Dampen a rag with isopropyl alcohol rubbing alcohol if latex paint or acetone if an oil paint.
It removes paint from all surfaces plus its non toxic no fumes or skin burns and is just as effective as your normal run of the mill toxic products.