How To Touch Up Galvanized Steel Roof Panel Scratches

All painted metal panels have a factory applied baked on finish.

How to touch up galvanized steel roof panel scratches.

Lay down the first roof steel panel squaring it with the mason line. 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. Cut the first rib off leaving of rib on the first roof sheet of roof steel. This step is simple.

Place the first screw about 7 inches from the bottom and each subsequent screw about 18 to 24 inches apart along the vertical run. Rub a gentle scrubbing cleanser onto rust spots on metal roofing using a clean cloth. Galvanized steel on the other hand cannot be painted with an oil based or aluminum based paint. Dab a small paintbrush into metal touch up paint and then cover the scratched area with the paint.

Clean the scratched portion of the roof with the mineral spirits and then rinse with clear water and allow it to dry. Install the roofing screws vertically along each rib in the panel. 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. Secure the screws but do not overtighten.

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. The roof panels are installed similar to the wall panels in layout. 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. Then pull the tape back like you are removing a band aid from a child s are.

The washer under the screw head should seal to the surface of the panel without bulging or shifting. Using screws fasten roof at top and bottom of the sheet in the flat next to each rib. Place a piece of scotch tape 610 over the touched up scratches and rub your thumb across this a dozen or so times with firm pressure. Let the paint dry for at least 48 hours.

Below are steps to prepare the metal before using touch up paint. While these paint coatings are durable improper handling and installation can mar and damage the finish. Galvanized metal requires either a zinc dust type paint or a latex paint.