Wes or others, I saw a guy named shaver on the smoke forum saying he found a life span of 10-15 years on a brick smoker due to facial loss on the veneer brick due to the thawing, heat and refreeze. Do you agree? I understand you applied a "lifeguard" on the exterior of your smoker and fireplace. How often do you re apply? How long do you know a brick smoker will last for use, being the exterior is solely outside temp and not affected by the fire from good insulation practice? If any of this were true, why would you build a brick smoker as you and I ? Further on, How did these chimneys from the 1890's -1940's keep on burning today without this worry? .....Very curious about all questions. Thanks to all that have an input!