For textured plastics I like using the green Brillo/pots and pans scratch pad for cleaning. Also, I like priming the surface with an adhesion promoter spray. And I really like SEM Landau Black paint. It’s kinda like a semi gloss and makes your textured plastic look like a grainy black leather
I did this a couple of months ago, paper towels with 70% isopropyl alcohol works really well too. No need to waste any cloths as you’d have to throw them away after wiping off the old dye.