Be sure to get screw caps that are slightly larger in diameter than the screw’s head. That way, none of the screw will show through.
Wood plugs work best if the screw’s head is below the surface of the wood. Some plugs extend past the surface of the wood as a decorative feature. If you want the plug flush with the surface, then trim it off with a flush-cut saw.
Use wood filler if you plan on painting or staining the wood. Some wood fillers come in 2 parts with a base and a hardener. Mix the 2 parts on a paper plate before applying it.
Avoid staining wood with a glue and sawdust plug since it might turn a different color than the rest of the wood.
You can paint over auto body filler, but it won’t take up color from stain.
Alternatively, you can use a nail gun with brad nails, which are small enough that you won’t notice them through the wood.
The screw will be invisible underneath the wood, but you may see slightly raised edges where you used your chisel. Just rub fine-grit sandpaper over the surface to smooth it out.
After you countersink a screw, you can fill the hole with wood filler or a plug if you want the screw completely hidden.
Pocket holes work best for joints on the back or bottom of furniture so you’re less likely to see them. You can fill pocket holes with wood filler, plugs, or wood dowels.
