Yes, you may! The green paint is Rust-Oleum's "Key Lime" spray paint. I wanted a color that matched the wavelength of the LEDs and LCD and the original red of the Waldorf knobs, while beautiful in their own right, would not do. So, after some experimenting, I found that this particular spray paint flakes very easily from the black rubber of the knob, yet holds pretty tight to the red (I'm assuming ABS) plastic. So, with an X-Acto knife and some patience, I got a fairly good approximation of what I wanted. I also masked the white strips of the front panel with the same paint to match the knobs. When you glance at it sideways from 3 feet, you can't tell. But when you look at it close up (as in the photos), yeah, it's hand done. Not professional, but it's mine and it still sounds sweet! :D I hope to make another MB-6582-esque synth in the next couple of months. Red lights, silver panel, wooden bookends. Now if I could just find the right kind of knobs...