Nigel is correct if you can imagine a bundle of straws bound together if you try to shape the material it will  just splinter away.if you are near a beach area sand gets swept/blown into the root system and this also hinders shaping the trunk.l guess what you could do is cut the trunk down to say 3/4 feet high and fill with resin and made a table or stool but as this tree has been infected it best be cut down and burnt. l have in recent weeks had the same problem but managed to date to save them my poolman dug out part of the crown on the effected trees and sprayed.These beetles are quiet big and the down side is they can fly.If your on the way to Ruimar they had  about 150 palms along that road and about 30% have been attacked. :(

Clorpirifos 48% EC (Concentrado emulsionable)  is the spray he uses.