I think I'd like to know how this does without the second layer. Reapplying every 500 flushes doesn't seem practical. For a family of four and two toilets, if e

I think I'd like to know how this does without the second layer. Reapplying every 500 flushes doesn't seem practical. For a family of four and two toilets, if everyone goes four times a day, you're talking about reapplying every 2 months. Permanent nanohairs sounds very ... permanent, if this doesn't work well without layer 2. I'm also curious about durability on a car, with windshield wipers and all. How permanent is permanent? I'll mention: 1) The price and quantity is a little bit off-putting. I'm not sure if that represents real costs (for many business models, the cost is a pennies, but the price goes way up to account for R&D, shipping, marketing, etc.). If this is expensive to produce, keep things as is. If it's dirt cheap, you may consider keeping price fixed, but notching up quantity a bit. If I can coat my whole car (rather than just windshield), or sink+toilet rather than just toilet, or even share with a friend, the economics become very different. 2) You really need online reviews. Few will risk a product like this unseen. Use Amazon or send review copies to someone.