How To Sand Metal Roof Before Painting

Start with 120 grit sandpaper and work to finer grade sandpapers ending with 320 grit.

How to sand metal roof before painting.

Consider using sandpaper with grit numbers that are higher than 400 for this work. If you plan to paint your metal surface after sanding consider one final bluff with wet sandpaper before painting especially if it is a vehicle surface. A wire brush or sandpaper may help loosen tough areas of paint. Remove all rust using your wire brush or sandpaper.

Scrape away any loose or flaking paint using your putty knife. To properly prepare new metal surfaces use mineral spirits to remove grease and apply a rust inhibitive primer before painting. For instance if you re painting a smaller roof you might use 80 120 grit sandpaper or a wire brush. For spots that are very badly rusted or too delicate or detailed to clean thoroughly use a product like rust oleum rust reformer which soaks into the rust and changes it into a non rusting paintable surface photo 3.

You can also give the painted surface a little sanding with sandpaper with a high grit number. To help the primer and paint adhere to the roof better try lightly scuffing the surface of the metal. Sand the entire metal roof surface very lightly with your wire. How do i repaint a metal roof on an old house.

This also works great as metal fence paint or metal shed paint. Attach an 80 grit sanding disk to your sander and begin sanding the metal surface from which you need to remove paint. How to prevent rusty tools. For large flat surfaces use a sanding block to get even pressure.

Some of the most common ones include. Sanding and applying primer. Sand the entire metal piece with 400 grit wet sanding sandpaper and a sanding block. This way you won t sand too much into the metal and weaken it.

With the rust removed sand the entire surface to smooth out uneven areas and dull the surface so the primer and paint can adhere. Once done you can paint over rust. Remove loose and peeling paint. Mist water from a spray bottle on the metal before sanding to lubricate the sandpaper and add more water as.

5 important steps preparing metal for paint.