Any easy way to fix overlapping surfaces?

[Peter Grass]

I was trying img4dat to create a decorated part and it looks decent but when I load it into ldpart editor and use the overlapping checking tool there are 525 overlapping surfaces.

So my questions are:

A) Is there an easy way to fix them?

B) Is there a way to stop them being generated in the first place in img4dat ?

I've attached the dat I was working on which is for part 3069pb1332
https://www.bricklink.com/v2/catalog/cat...conly%22:0}