Hi Pete -
You will be surprised how well it works. I was skeptical at first, but faced with a scratchbuild with more than 800 rivets on it, to me it seemed the path of least resistance. No holes to drill, no glue required

. I spent ten minutes practicing, and set to. By the end of the evening session (four hours), I had 500 of them done, and the rest went down the next evening no problem. It was a total anticlimax after sweating how to do them for a month.
This method will make little dome heads, but not hemispheres, unless you do each one twice to make them more pronounced.
Looking forward to hearing how it goes -
Malcolm
PS - Forgot to mention, another advantage to this method, if you screw one up, wipe it off and do it over, it's totally forgiving.