Yes there is a special tool. Brick jointing tool.
There are different sizes and shapes, so first examine the size and shape of what is on the rest of your house. Commonly convex, but might be flat also.
Also looks like you put too much mortar.
There are different sizes and shapes, so first examine the size and shape of what is on the rest of your house. Commonly convex, but might be flat also.
Also looks like you put too much mortar.