Ok, could have explained a bit better I guess.
The pin rivets are of this type
http://www.hlj.com/product/SAK4449
and as you can see they have a fairly long pin that has to go through a drilled hole. If they were to go through the bonnet they could be left uncut but as they are to be mounted on the plate behind the doors of my 206 pug they have to be pretty much in level with the body not to interfer with the inside door panels.
/Joel