T-80 Soviet light tank - Gray scale preshading

Hello my friends. I've tried to paint my T-80 with the preshading "Black and White" style from José Luis López Ruiz. In fact it is a gray scale painting to make all light and worn effects before the application of the current paint.
During the building stage I've prepainted the lower hull, road wheels and tracks for ease, they will be treated later.
After a coat of Vallejo Acrylic Polyurethane grey primer, I've sprayed the Tamiya XF-1 Black on all recesses and around all details followed by Tamiya XF-2 White and two grey tones (XF-24 and XF-83).
This is the result on my MiniArt T-80 :

Any kind of comments or suggestions will be appreciated. Thanks.