We have a log home built in 1980. The logs where used hydro cedar poles that were machined down to 8” logs. They were then beveled to fit one on the other and partially hollowed to allow fibreglass insulation to be placed in the cavity. On the interior there are now some places where the logs have cracked and the insulation is showing. In some places the crack is as thick as my thumb. To my knowledge the interior logs have never been finished with any product. Any suggestions as to how we coul