- Is 20H hardness real?
- No independent test backs a 20H pencil-hardness rating on car paint. Treat it as a marketing label; the coating does add a slick, sacrificial layer but will still mar from grit and bad washing.
- How long does it actually last?
- The 10+ year claim assumes perfect prep, indoor curing and careful maintenance. Realistically expect a few years of visible beading on a daily-driven car, less on a neglected finish.
- Can I apply it over wax or an old coating?
- No. It bonds to bare, clean paint. Strip wax, clay, and ideally polish before applying, or it will sit on top and fail early.
- How much does 70ml cover?
- Enough for one mid-size car or a small SUV with a little spare. Large SUVs, vans and trucks may need a second bottle, especially if you coat wheels and glass.
- How long before it can get wet?
- Keep it dry for at least 24 hours and avoid washing for about a week. Full cure takes longer in cool or humid conditions.
- Does it work on glass, wheels and trim?
- Yes, it can be used on glass, wheels and plastic trim, and it helps shed water and brake dust. Avoid textured plastics where residue can dry white.
- Where is the 20H Nano Graphene Ceramic Coating for Cars, 70ml cheapest?
- At Amazon, for $23.98, 63% under what the other stores charge, as of our latest check.
- Where can I buy the 20H Nano Graphene Ceramic Coating for Cars, 70ml?
- 4 stores we checked sell it, including eBay, Walmart, Sears, Amazon.