As far as painting the Schpeltor Lonn type...
There are 2 approaches that you will see when browsing photos online. One is the kaiyodo approach (this is the kit you have, Akuma), and the volks approach (as applied to the Volks MM series Schpeltor Lonn kits, both with and without buster versions).
The paint jobs applied to the Kaiyodo and Volks versions are essentially the same, except that kaiyodo chose to replace most of the gold on the design with silver instead. I really don't know why they did this.
Schpeltor Lonn is really the same machine as the Schpeltor Kaien/Water Dragon, it's just had a few parts changed/modified. Since the original Schpeltor has gold but no silver, I feel the all-good detailing approach is best for the Lonn type as well.
This is the kaiyodo style:
http://www.animebox.com.hk/fss35.htm
http://www.e2046.com/trade/productview/2033
This is the volks style:
http://www.animebox.com.hk/fss31.htm
http://www.hobbyfan.com/product_info.ph ... ts_id=1265
http://www.e2046.com/trade/productview/936
Opinion may vary on which paint approach looks 'nicer', but I do feel the all-gold approach is probably more 'correct', since there seems to be no official basis for the change to silver armor pieces, unless it's mentioned in some obscure text somewhere.
No matter which way you go, the feet are mainly white. There is a metallic accent area between the toe and ankle, which you can clearly see in the photos. This metallic accent area will be gold if you follow the Volks approach, or silver if you follow the Kaiyodo approach.
The key metallic areas of the Schpeltor Lonn (whether you go with silver or gold) are:
-ankle armor
-forearm armor and wrist guards
-strip running down the top/middle of the head
-accent on the feet
-skirts
-small accent at the front/bottom of the chest, just above the grey waist area
If you have any further questions, feel free to ask. I painted one of those kaiyodo Schpeltors some years ago.