how to fix uneven surfaces in C4D

Hi,

take a look at the screenshot link (ongoing bug with the forum that I can not attach my image even though it’s below the required size).

I know ways to fix these uneven bits in Blender using Average Faces, but some times it doesn’t quite to the trick. There is something similar in Maya as well.

I have to assume there’s a way to do this in C4D but I can’t find it. This surface was find until I combined it. How to I mane it flat again?

https://www.dropbox.com/s/5mnkir036jju775/Screen Shot 2020-10-28 at 2.29.12 PM.png?dl=0

Thanks
Dave