Man, i can't believe how hard it is to find gray spray primer in guildford, UK.
Finally found it though, at a shop that recently opened.
I have to say getting this thing cleaned was a nightmare. The support material from the printer is everywhere and without a waterjet it just turns into a gritty layer on your model. After a while i was a bit fed up so i decided to just start spraying the model
The cold outside and from the paint did warp the model a bit. Therefore i had to resettle the right foot (as you can see in the picture, some bluetack had to be added).
So i unloaded the Tamiya fine gray primer onto the white detail model. It makes the print lines very obvious, but nothing a couple more coats can't fix.
It pulls out the shapes a lot, and now it finally looks like a proper model
i'm very happy with it.
pictures: