I don't know how well it will hold up (spackling) so I'm keeping it for a while just in case. I used it as grain filler. It works with paint. if it falls out I can always pour epoxy over it.Fred, that looks outstanding, which is not surprising because all that you do turns out beautifully! That said, I am still trying to wrap my head around the use of "spackling", but there is no arguing with the result...it is stunning.