While acrylic scratches more easily than glass it is really not much worse than low-iron glass. The 'green' glass tanks like TopFin/Marineland/Perfecto are tough and do not scratch easily. It only took a couple of seconds with an unnoticed grain of sand to permanently scratch my Waterbox Peninsula 15. That sand would have also scratched my acrylic tanks but not necessarily permanently. Acrylic scratches can be buff out if not too deep. Actually they can be buffed out even if it is deep and you are determined enough.
Any pad listed as acrylic safe can be used for cleaning. I personally use an Algae Free Piranha Float Plus (I believe you would need the Tiger Sark Float Plus due to the thickness of your panels) with the acrylic pad and plastic blade for everyday cleaning. I actually don't use the plastic scrapper portion of the magnetic cleaner often as I find using the Continuum to be quicker in the long run for the tough stuff but since it is on the scrapper it gets some of it anyway. For tougher stuff you can use a credit card or any plastic blade. I use the blue-plastic bladed Continuum scrappers.
Magic Erasers do work as well along with the various derivatives (melamine foam) available in the hobby. Be careful with all of these to use longer slower strokes than you may be used to. It is possible to put micro-scratches in the acrylic or even low-iron glass with the sponge or pad if you try to use it like a Brillo pad.
