I will have to go with a combination of your ideas. Some of the rivets has to go on early as they are partially going to be covered with decals. Perhaps it's an idea to attach these ones and then cover with clear to get them to sit tight and then apply the decals? The ones for the bonnet will go on later and don't seem to get me into trouble, well maybe one or two that might interfer with the head lights. Will have to sand these down properly from the inside.
Thank's for all your input, and the english lesson Freakray ;-) I changed the spelling on top...
/Joel