If the shutters are just old and need a new coat of paint, then sand them down and give them a good coat of primer followed by at least two coats of your desired color. If the shutters are damaged, you'll need to repair them before painting. If a slat is broken, replace it with a new slat of the same width. If the shutter is warped, you can usually fix it by wetting it and then clamping it in place until it dries.

Depending on the severity of the damage, you may be able to fix old wooden shutters with a few simple repairs. First, you'll need to identify what is wrong with the shutter and then take the appropriate measures to fix it. If the shutter is broken or cracked, you can use wood glue or clamps to hold the pieces together while the glue dries. If the shutter is warped, you can use a damp cloth and some weight (like a book or brick) to help it regain its shape. And if the hinges are loose, you can tighten them up with a screwdriver.