Touch upâs should be done minimum 4-6 weeks post the initial treatment. This allows time for eyebrows to heal fully before perfecting them for the second time. Free touch-ups are only valid up to 3 months from initial procedure date.
Re: The Tinny sound? Most folks that are concerned about a tinny noise with aluminum boats are referring to the noise generated by the hull moving through the water (which can be modulated/reduced through many different avenues). You mention vibration and rpms, so I'm guessing that you're not referring to that sound.
Is the Tin Whistle Still Made of Tin? Today, rather than being made from tin and wood like Clarkeâs original, most tin whistles are made using brass or nickel-plated brass and a plastic fipple. Even with these differences in manufacturing, the tin whistle has kept its colloquial name despite no longer being made using tin.