How To Touch Up Galvanized Steel Roof Panel Scratches

Dab a small paintbrush into metal touch up paint and then cover the scratched area with the paint.

How to touch up galvanized steel roof panel scratches.

Touch up paint can cover unwanted scratches chips abrasion marks or other lightly damaged areas on the panel to present a consistent finish and appearance. Use a paint pen or 1 4 artist brush only the narrow edge of the paintbrush should contact the scratch or blemish lightly sand or feather with 400 grit sandpaper for edges of deep scratches. Scratches can easily be fixed with a paint or touch up pen designed to match the color of the roof. Then pull the tape back like you are removing a band aid from a child s are.

My house was built circa 1880 and still has its original terne metal roof which consists of individual metal shingles with an embossed decorative pattern. Galvanized metal requires either a zinc dust type paint or a latex paint. Once the touch up has been applied check for proper inter coat adhesion. Touch up and repair with zinc spray metallizing zinc spray metallizing is done by melting zinc powder or zinc wire in a flame or electric arc and projecting the molten zinc droplets by air or gas onto the surface to be coated.

Secure the screws but do not overtighten. While these paint coatings are durable improper handling and installation can mar and damage the finish. Let the paint dry for at least 48 hours. The zinc used is nominally 99 5 pure or better.

Using screws fasten roof at top and bottom of the sheet in the flat next to each rib. The washer under the screw head should seal to the surface of the panel without bulging or shifting. Lay down the first roof steel panel squaring it with the mason line. This step is simple.

Cut the first rib off leaving of rib on the first roof sheet of roof steel. Rub a gentle scrubbing cleanser onto rust spots on metal roofing using a clean cloth. Clean the scratched portion of the roof with the mineral spirits and then rinse with clear water and allow it to dry. Below are steps to prepare the metal before using touch up paint.

All painted metal panels have a factory applied baked on finish. Galvanized steel on the other hand cannot be painted with an oil based or aluminum based paint. The roof panels are installed similar to the wall panels in layout.