James? That's a polishing compound. Just applying and removing doesn't work.

From Meguiar's website:

Product Features:
Microscopic Diminishing Abrasive™ technology helps remove light oxidation, chemical degradation, surface contamination, stains and light surface scratches
Gel formula is designed to restore optical clarity to both rigid and flexible clear plastics
Water-resistant polymers provide long-lasting, durable protection to keep plastics clear
For best results, apply with a Meguiar's® High Tech Applicator Pad or Ultra Plush Super Terry (both sold separately) and use an Ultra Plush Super Terry or a Supreme Shine® Microfiber (both sold separately) for the final wipe-off

Just sayin' buddy.