My chocolate is for display only so the above does not apply.... I did a video on taking apart and cleaning
a Wagner. It's a 3 minute job cleaning. http://youtu.be/rqJpdpBYpNQ
yeah cocoa butter is great, recipe is 50/50 chocolate to cocoa butter. we used to buy it until we tried making it ourselves. go to a hobby store for your airbrush I got a brush and compressor for 175.00
the whole effect of the water bath is to cook the cheesecake at an even temp thru-out the cooking time and to add mosture. no water bath will cause the middle to crack.
HowStuffWorks "What is a Water Bath?"