Basic question for Eames Zenith Armchair  

Hi,
I know these are really basics questions for Eames fans but,
I have to ask before doing something stupid!
Detail:
My shell is a first edition Zenith (with rope) in a Elephant Grey color with original stockmount.

1- Which kind of bases am I allowed to put on this shell ?
If I'm right, the stockmounts are larger than the more recent version of it.
Cat cradel, rocker, x, ... ?
2- Does anyone have tryed to clean these kind of shellsl ?
I'm actually looking at some blogs for "boat repair" and "vintage shop repair" and it's seem not that complicated to do... at least if you don't have money (like me!)
Most of the clean the shell with ACTONE (mine have little white paint spots on it).Then, they sand it with a really fine (water-)sandpaper and apply a product call PENETROL. After some are using COMPOUND (I don't kown what it is?) and a buffer, but i'm not sure...

3-
The screw ? Any one have exact mesurement for them ?

If anyone want to help with his/her knowledge,
you're more than welcome!
thanks!