All good; we can't win them all, but you're maybe 1 in 1000. Sanding is not required but suggested when switching to a different compound, etc. Although this does not apply to our product only ...its just a general rule of thumb moving from one pad to another.
As far as noise, again thats a huge red-flag that something else is going on - there is no way we would have been as successful as we've been with issues like this as commonplace. The lack of noise is the hallmark characteristic that was actually a happy by-product of our formula, but its what most people gravitate to as far as what they notice the most.
Happy to take this off line to email - hit us on our contact form and I can explain further (ie: alcohol doesn't really do anything but remove oil from your fingers), and I'm happy to offer a refund as well. Thats what the guarantee is for. I get the value of time, but you're a really, really rare case if you had a negative experience. I'm disappointed that you didn't have the right experience but proud to say that 99.9% of our users do.