I have the tray model as shown below. [Image 1]
Here is the blender file: Trays
Which was created by boolean subtracting the spaces.
I want to bevel the top edges, but the booleans left over extra edges [Image 2], so the top is not a 'single face', and this ruins the bevel (with 'Clamp Overlap' off). [Image 3]
I have tried Dissolve Edges, but blender says "Invalid boundary region to join faces". I have tried removing double vertices. And I have tried scaling in Z axis to 0 to ensure all vertices are on exactly the same plane, then Dissolve Edges - still doesn't work.
How do I make the entire top 'one face' so that my bevel will work? Or another solution?