CozyGirrrl@aol.com wrote:
> And all this will work only if the combustion chamber is always squeaky
> clean, no deposits or film on the windows, once that happens it all goes
> to heck quickly.
>  

If you've got a film building up on the rotor housing's chrome face, aren't you behind the curve already?  I could see
it being a problem in a piston cylinder's head.  I've had to chip off gunk with a screwdriver it had built up so thick.
 But they aren't constantly being wiped by an apex seal like in a rotary.