Thanks a lot for the input
I do have Trichloroethylene wich degreases quite efficiently , perhaps too much lol . (Used to use this to remove the glue on the tyre for my touring car)
The 100gr less throught the batteries is quite a lot , why I can't find post of people looking to lose weight of their car by this mean ? I see a lot of folks drilling and cutting stuff but not gainning 1/3 batterie weight by just considering different brands/size/capacity Mah . The races only last a few minutes you never really need 5000+mah exept training .
Thanks again