Meguiar's Marine/RV M4516 High Gloss Polish - Professional Grade Boat and RV Polish for a Sleek, High-Shine Finish for Fiberglass & Gel Coat - 16 Oz

I recently tried this boat motor cleaner after neglecting my motors for a couple of years, and I was amazed by the results. Despite being a bit pricey and requiring a generous amount for both my main motor and kicker, the cleaner worked wonders. Unlike other products I've used before, this one successfully removed tough water spots and hard water build-up from the bottom drive unit. Although it required some effort to scrub, the outcome was worth it. I highly recommend this cleaner for anyone struggling with stubborn stains on their boat motors. It's truly a game-changer that outperformed all my previous attempts combined.

Boat motors had been neglected for a couple of years and wanted them to look better. I didn’t get pictures but my motor looks new again. Kinda on the pricey side as I used almost the whole bottle between my main motor and my kicker. But then again what isn’t expensive anymore. I would recommend and buy again. Worked really well when multiple other attempts and products failed to even touch the water spots. It even took the thick hard water build up off of the bottom drive unit. This is the thicker stuff and it did take a little bit of elbow grease but it was still less than all of my other attempts combined.

The product works great. However in applying this product you must do small sections at a time approx. 2'x2' sections in the shade. It can be hard to remove. You may need a spray bottle to apply a light mist to help with removal. I DIDD NOT APPLY THIS TO A BOAT it was used on my vehicle. I DO NOT KNOW HOW THIS APPLIES TO A BOAT HULL OR FIBERGLASS.

Seems good, came on time gunna test on my vw Jetta good to see if the hard spots come off from the sprinklers systems.

Worked excellent on my rv camper that kept getting sprayed by the sprinklers.

Didn't work for me. I used it as directed and it didn't remove the water spots on my car glass. I even tried two applications, let it sit as directed, and used a clean cotton towel to wipe the glass and followed up with a new micro fiber cloth but the spots were still there.I work in the auto repair industry and have used a lot of cleaning and polishing products and this one was less than satisfactory. I ended up using a very fine polishing compound with #0000 super fine steel wool on my exterior glass which to all of the spots off my glass. I followed up by using glass cleaner and a micro fiber cloth and ended up with a "spotless" finish.I won't try any other water spot removers in the future, I was really hoping this one would work but it didn't.

This Marine/RV Polish by Meguiar's is amazing! It delivers a professional-grade, high-gloss shine on fiberglass and gel coat surfaces. Easy to apply and buff off, leaving a sleek, long-lasting finish. Perfect for boats and RVs—highly recommend for a showroom-worthy look!

Nice product.