Urethane Faux stone Column--repair hole

I have 2 cast urethane faux stone columns on my patio. They look exactly like architectural stone with the texture and all except they are very lightweight. The problem is this: the woodpeckers have made holes in them. One would think that there would be a spray foam on the market to make a simple repair, but there is not. There is a can of bright orange insulation foam but as these are off white this product is not usable. Does anyone have any ideas for me? The holes are up to 2 1/2" in dia. and I have about 4 of them. This photo may help.
Thanks
Missy Charlotte

You may try to plastic weld the holes closed.If they are made from plastic urethane.

you can use PL construction adhesive (like liquid nails). We sell it on our website www.fauxpanels.com or www.fauxwoodbeams.com Or any home depot, lowes, or hardware store will have it. good luck!

u could fill the holes with expanding foam, let it set then cut off the excess with a knife or saw. then paint it!!