Fork crown race too big

First of all is you fork got an alloy steerer or Steel?

If Steel, you can either send it to a frame and fork specialist and they put brass around the bottom of the steerer and then ream it, this may mean a re-spray. 2nd option is get a sharp but broad centre punch and 'BOP' all around the race area (cheapest option)

If alloy, is it really loose that when you turn the fork upside down it falls off?....... get an alloy can (coke etc) and cut a very thin piece and glue that on maybe then press your race on!

DONT GLUE IT! GLUE WILL BREAK DOWN AND WILL COME LOOSE AFTER A SHORT PERIOD OF TIME! :)

I'm not sure what you mean by this: "2nd option is get a sharp but broad centre punch and 'BOP' all around the race area (cheapest option)"