Final layer of cob oven
last year my husband and i build a cob oven using clay from a pipeline that was being dug on our property. we did 3 layers, a base layer, insulating layer then a final layer. this year the final layer is cracking really bad and i have mud dobbers boring holes in it;and it doesnt look very nice. i was thinking of using a stucco or a fine concrete mix to protect it more. any thoughts on this. i will post pictures later when i get to my home computer.