I hear you on the "Putting the car on a diet" thing.. I worked a whole winter on my old American Sedan Camaro and managed to find a total of 35# ((sigh)) It was still 80# overweight and I only weighed 200# at the time (I'm 6'3").. I wish I could afford an alloy block too!
On Anodizing - I've been told that anodizing changes the hardness value of the alloy. Sandy - you could polish it with an automotive buffer and a product we use on airplanes called Met-All (You can get it from
Pilot Supplies, Avionics, and Homebuilt Aircraft Parts from Aircraft Spruce and Specialty Co. )
You might notice that this stuff is probably the best metal polish since Simichrome. Matter of fact you might notice that it's exactly like Simichrome except that a pint tub of it costs half of what a 4oz tube of Simichrome costs..
Use something like ZoopSeal to seal the metal after polishing..
For me - I'm still considering PCing the chassis.