I have, and am familiar with both Frozen paints and Xpel PPF Stealth (matte) products. As mentioned, Dr Beasley's will have about everything you need. And, really, it's not too difficult to maintain.
Biggest thing...do not use anything that "enhances gloss or adds shine". And do not agitate or scrub the surface. These things are fine for gloss paint, but NOT matte surfaces.
Debris is removed with chemical means on matte, versus mechanical means on gloss. You need to dissolved the debris and wipe it away versus scrub it off.
Since you have matte PPF, look at the Dr Beasley FILM CLEANSER...this will be the one to help remove and stuck-on debris from time to time that doesn't come off with just washing. Beyond that, the MATTE BODY WASH will be a go-to product, and then the MATTE BEAD HERO for a sacrificial protection layer and beading enhancer.
If you like to "quick detail", you can use the MATTE WATERLESS WASH for this purpose, although it's not a necessary thing...more for OCD people that just like the process.
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