Nail holes in exterior surfaces just as with cracks or gaps can be dealt with using a good caulking.
Filling nail holes in cedar siding.
Epoxy putty is a commonly recommended wood filler for use in repairing woodpecker damage.
1 the installation guide for hardie board which is a brand of cement board siding recommends using caulking to fill nail holes.
Clear paintable caulking can be used on cracks gaps.
Roughen the area you want to patch with 80 grit sandpaper for a better bond.
Once the caulk is dry you can touch up the paint.
To patch holes and depressions in siding of any kind follow these steps.
Repairing minor defects in cedar siding step 1 use a putty knife to apply exterior wood putty to smaller cracks or holes in siding.
Fill the area with patching compound.
When i ve installed it i used a high quality exterior paintable calking after smoothing the edge of the holes.
Holes in wood trim are best filled with wood filler.
Fill the siding holes with wood filler.
The best filler for your siding is a two part epoxy product that cures to a rock hard consistency.
Wood filler can be used for small holes dents etc.
Choosing the best wood filler for your project.
Work the putty down into the holes and smear the putty over the top and edges of the defect.
Clean the hole or depression you plan to fill.
Some are suitable for filling voids such as divots holes or gouges in.
Use a putty knife to force the filler inside the hole making sure to fill in the hole and to completely cover the opening.
Scrape away any excess with the putty knife when you re done and allow it to air dry.
1 scrape all loose paint from around the area to be repaired using a paint scraper or putty.
I would suggest famowood as it shrinks the least and have a good selection of colours.