How To Sand Metal Roof Before Painting

How do i repaint a metal roof on an old house.

How to sand metal roof before painting.

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. Remove loose and peeling paint. Sand the entire metal roof surface very lightly with your wire. If the old paint is in poor condition you can remove it by hand wire.

Sanding and applying primer. How to prevent rusty tools. This also works great as metal fence paint or metal shed paint. You can also give the painted surface a little sanding with sandpaper with a high grit number.

Remove all rust using your wire brush or sandpaper. A wire brush or sandpaper may help loosen tough areas of paint. 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. Consider using sandpaper with grit numbers that are higher than 400 for this work.

Attach an 80 grit sanding disk to your sander and begin sanding the metal surface from which you need to remove paint. No matter you are sanding metal for painting it fresh or need to sand off the old peeling paint from your metal before spray painting there are a few efficient ways that can be tried out. For instance if you re painting a smaller roof you might use 80 120 grit sandpaper or a wire brush. Start with 120 grit sandpaper and work to finer grade sandpapers ending with 320 grit.

Sand the entire metal piece with 400 grit wet sanding sandpaper and a sanding block. With the rust removed sand the entire surface to smooth out uneven areas and dull the surface so the primer and paint can adhere. Some of the most common ones include. Once done you can paint over rust.

Because 80 grit is pretty coarse stop using it when the paint is almost all the way off. Scrape away any loose or flaking paint using your putty knife. Mist water from a spray bottle on the metal before sanding to lubricate the sandpaper and add more water as. To properly prepare new metal surfaces use mineral spirits to remove grease and apply a rust inhibitive primer before painting.

This way you won t sand too much into the metal and weaken it.