Yes Plastrecine a 2 stroker will definately start when hot. I have done this a few times myself. Just be careful of the sharp prop edges. I know, believe me I know. The brown coming out may be unburnt castor oil. Check to see if your fuel has castor in it. If a little comes out this is normal. If a pile comes out check to see if you are runing rich. I hope this clears up your questions.

Mark Shuman