Sometimes you come across a set of slates that are really messed up, like in this case which was on a GC1-2-3, with mixed slates that didn't match in thickness or in the seams because they were from 3 different sets of slates.
The first think you want to do is level the slates as best you can, while making sure the seams are flat to each other using at least a 2' straight edge. Once that's done, then outline the areas that you're going to fill in with bondo with a marker, then fill with bondo. Once that's done, next comes the challenge of sanding the bondo flat so that there's no ripples in the bondo.


The first think you want to do is level the slates as best you can, while making sure the seams are flat to each other using at least a 2' straight edge. Once that's done, then outline the areas that you're going to fill in with bondo with a marker, then fill with bondo. Once that's done, next comes the challenge of sanding the bondo flat so that there's no ripples in the bondo.

