Help with Swansdown Mop on Drill

My previous experience with these mops was a ubeat 4" 75fold on my drill using eee ultra shine on oil based poly to cut out 2000grit sand marks & it did a good job. But I brought one of the other brand 6" 100 fold mops using the auto grade Meguiars M105 compound to try & cut the fine sanding marks out in my 2 pack poly finish but every time two problems happen.
1, The process always add ~800grit scratches in various places. With lite or hard pressure.
2, I can never seem to get all the sand marks out near the edges of the flat wood. No matter how much speed or pressure, the inner middle areas are nice & gloss, but the few cm inwards from the edges & it's semi gloss.

In the end I had to resort to using my cheapo SCA rotary buffer & M105 with wool pad holding flat & it came up great just a bit of swirl, no issues at all with not buffing the edges.

The 1st problem happened the very first time I used the mop, before that I conditioned it by running it on the edges of a copping saw blade & after each use when the compound dries I do it again so the mop is soft.

Has anyone had these problems & did they find the cause? Maybe the compound I use isnt ideal on swansdown?

thanks

I don't use poly or two pack, and this will probably sound idiotic, but, have you tried finishing a scrap piece of timber exactly the same way as you do the real deal, but let it dry longer. Can't say what time, but to me it sounds like scratching through still unset finish.

Regards,

Rob