Thanks guys. I always use the right size rivet, after all who wants all that extra weight with an overlong rivet
good point about the mandrel snapping in the wrong place though Gordon, thx, useful looking rivet gun too but I already have a CK one which I've used for a few years and has been excellent, it has 3 jaws instead of the usual two. I am goijng to be rebuilding a Clubmans car so plenty of panelling to do, floor, sides, internal etc, will all be Ally NS4 on to steel spaceframe. Interesting stuff about using a bonding agent, looking around the aircraft sites it seems they make non setting silicones for cabin panels. Anyone got any specific recommendations?