Yeh, the color is the OEM gaskets. If you were to put the engine in the oven, besides the smell, you'd most likely mess up some seals and o-rings pretty badly, not to mention how bad the smell of the oil that's still lining the inside of your cases would smell as you crusted it to the inside. Maybe it can be done, but I'm not risking having the missus come home to me pulling an engine out of the oven and the house fumugated
I'd be the next thing going into the oven.
I have baked parts as individual pieces prior to my current living arrangement but you do need to rip the engine all the way down, clean it inside and out, and remove all rubber bits.
On another note, I just got the bucket wired, headlight, gauges, cables, and airbox installed, points set and timed statically, and the kickstarter back on. Still have to set the valves, get the front brake MC and union painted and installed, and get the Hondaman ignition set-up in the mail and install it before I can start her up. I'm just itching to hear her run soon. I'm going to try and get some more pics tonight of the progress.