oven location for powder coating

Anyone have the "do it yourself powder coating" setup from say Eastwood? I've got one but have yet to use it. My most important question is: they say NOT to use your kitchen oven, but is that because fumes will fill the house and kill you ir because it'll taint the oven forever? I have a spare oven and wonder if I can set it up in the basement where I have a 220 volt outlet.