Sanding will create a smooth surface and help the new paint to adhere better to the gutters.
How to paint gutters to look like copper.
However you can get the same look on.
One option is to buy a can of spray paint in copper and paint them yourself just be certain you buy a good quality paint and test the color on an inconspicuous spot as the color can oxidize somewhat and change.
Also make sure the primer you are choosing is suitable for outdoor use.
Paint them to blend in.
Unless you pay to have a true faux finish applied painting them a single color will never look like aged copper.
Installing copper rain gutters on your home might not be a practical option.
Repeat until the surface has an even coverage of copper.
Let dry about an hour before applying a second coat.
Sand the gutters with a medium sanding block.
Work the gutters over lightly with the sandpaper to remove rough patches and get rid of any remaining old paint.
If you have any questions let me know in the comments.
Mix the copper surfacer well to ensure that the metal particles are evenly distributed.
To save time use a palm sander instead of a sanding block.
Using copper dark brown and a tealspray paint as well as sand paper you can achieve a similar look to that of aged copper for a fraction of the cost.
Apply a thin coat using one of the foam brushes.
Just wipe any loose dust or debris from the surface.
Oct 29 2015 copper is a prized and very expensive building material.
I love my copper gutters and instead of spray paint save your money and use the liquid version and you can have mock copper gutters just like those fancy 30 per foot ones.
Use metal primer in order to get the paint to stick you need to use a 2 part metal primer the first part will bond to the copper gutters and the second part will bind to the primer.
I ve done exterior faux finish work that has held up over time but nothing exposed to the elements like gutters and down spouts.