As you are dealing with different problems different solutions will be required or a combination of solutions.
Repair cedar siding holes.
Work the putty down into the holes and smear the putty over the top and edges of the defect.
Use a putty knife to force the filler inside the hole making sure to fill in the hole and to completely cover the opening.
Nail it into the surrounding sill and to further solidify the patch drill holes around the perimeter and fill each hole with epoxy image 3.
Fill cracks in painted siding with either exterior acrylic latex caulk caulk or with epoxy wood filler which is a better choice.
Clear paintable caulking can be used on cracks gaps.
Smear a generous layer of the epoxy putty over the holes.
If the siding is unpainted stick with epoxy filler it s.
Fill the siding holes with wood filler.
Place the replacement sill into the hole images 1 and 2 fitting it in tightly with a sledgehammer.
Fixing warped wood boards.
Re stain the entire board to blend the putty into the look of the siding.
I would suggest famowood as it shrinks the least and have a good selection of colours.
Scrape away any excess with the putty knife when you re done and allow it to air dry.
Epoxy putty is a commonly recommended wood filler for use in repairing woodpecker damage.
However over the lifetime of the product james hardie siding will require no additional money spent on painting whereas the cedar siding will have been painting five times.
Repairing minor defects in cedar siding step 1 use a putty knife to apply exterior wood putty to smaller cracks or holes in siding.
This will help strengthen the delicate wood that surrounds the repair.
At first i thought it was a woodpecker because there were about 10 holes that looked like someone started to drill into the siding.
There was one quarter half dollar size hole that went all the way thru.
Lets assume it costs 8 000 to paint the house each cycle and the cost never goes up in price just pretend thats an additional 40 000 just for repaint alone not including caulking replacement and cedar siding replacement.
Wood filler can be used for small holes dents etc.