That cigar pen is nicely done ... and nicely matte.
Meguiar's product numbers are different in Canada.
When I do the "finishing" of blanks on my lathe I keep the lathe power off. . I rotate the headstock chuck by hand.
And I use only lengthwise strokes with fairly light pressure.
With acrylics, after turning to a smooth surface with round carbide cutter, I sand with 240, 320, 400, 600, (maybe 800), at which point the surface is looking pretty nice but is still matte.
Then I usually use Meguiar's cut polish (but sometimes omit that), and then use Novus 3 followed by Novus 2 and finally PlastX.
The surface is usually still quite matte after the Novus 3. . I get the same general results on AA acrylic, Rhino, and CA.
I have never noticed any significant variations in these results. . Sorry I cannot offer help specific to your problem of achieving matte.