Did you coat the monster mud with any additional paint/waterproofing agent?You could. But my monster mud projects have been outside the entire month of October for 5 years now and show no sign of weather decay. I also have wood and chicken wire armature with cloth over it and I can say that the monster mud projects have much better detail and shape, Either way you choose will be fine. I suggest doing both to see which one you ultimately prefer.
Really?!?! So just the exposed hardened joint compound withstood the elements over 5 years? I suppose the top coat of paint helped protect it as well. I do have paint mixed with my compound as well. Along with paint mixed with the drylock. I feel a little better about this now.On one of my tombstone I sprayed clear Flex-Seal as an experiment. And that was ...ok. The following season that tombstone however took on a decidedly greenish hue. Which isn't terrible. But it wasn't worth my bother to spray the rest of them or anything else because I didn't feel it added any real benefit.
The others are all "unprotected" and doing just fine is Missouri which rains pretty non-stop during October. Perhaps my paint to joint compound was heavier on the paint? Or the fact that I painted over the monster mud to highlight and shade and detail. But they don't really show any wear at all. When I pull them out of the garage in 2 weeks I can upload pictures to show.