I will start by saying I am very new to CNCs and milling. I did however just complete my ATC build (Onefinity Woodworker CNC, Masso G3 controller, Jianken 2.2Kw 24000RPM ATC spindle), and am now practicing my F360 CAM skills while trying to determine appropriate feeds and speeds that match my CNCs hardware and tooling when milling various materials.

I plan to test a facing toolpath on HDPE, and while running an 'air' pass as a test, I noticed that the feed rate changes during each pass as the end mill accelerates and decelerates across the work piece.
I am noticing this now more as I am experimenting with increased feed rates.

My general question is what options there are to reduce this variation so that the feed rate remains more constant throughout the entire facing toolpath. I ask because I imagine in extreme cases it can/will impact the finish at the start and end of each facing pass.

I know I can alter the acceleration/feed rate settings in my controller, and in my CAM, but what do others do when they want to keep tooling fully engaged with the material at all times with a high feed rate during a facing operation.

I appreciate any advice and insights those with experience can provide.