For smoothing the edges of scraped spots here and there, you can wrap a piece of sandpaper around a wood block. For larger areas, it's less tiring and more effective to use an electric orbital sander. Move it up and down or back and forth across the surface to remove old paint and smooth rough edges at the same time. Don't use an electric disc sander or a belt sander. Both can leave swirls or dips in the wood that will show through a new coat of paint.
The cost to paint the exterior of your home will vary depending on the size of your home, the condition of your siding, type of paint used and other factors. The average cost for labor and supplies ranges between $1,800-$3,800 and it may cost $6,500 or more for a large, custom project. In addition, you may need to pay more if there is damage to your siding or other challenging aspects of your job.