A method of removing coating from a substrate may include contacting at least a portion of a surface of a substrate to an electrolytic substance, where at least a portion of the surface includes cadmium; connecting a power source to the substrate and to an anode material; applying a current and a voltage; and removing at least a portion of coating from the substrate. The driving profile program collects information about an end user’s driving activity. Most preferably, some locking structure is provided which locks the medical sharp instrument within the cover at both the use and non-use positions. To ensure accuracy and position of the T2 values, the effects of signal level off set, instrumental drift, and noise level is incorporated into the calculations. Also disclosed are drug delivery devices and methods for the transdermal administration of fenoldopam for the treatment of hypertension, congestive heart failure, and chronic and acute renal failure.