If you use wavelets from Registax, despite of to be stacked with AS!2, you can use the resources of mask inside of Registax wavelets. With it you can enhance details of surface of planet but not so strong at borders, since this mask has adjust of size, radius and histogram.
The "onion borders" will exist, but not so evident.
note: if you look the second photo, original size, with attention, you will see these onions borders, but very faint. I used mask on my process.
http://www.iceinspace.com.au/forum/a...e.php?a=157657
the same here:
http://www.iceinspace.com.au/forum/a...e.php?a=157435