It's easy to remove the spoiler. A couple of nuts on the underside need undoing and the spoiler pops right off.
If you are going without a spoiler, you can fill the holes with blanking plugs, or do it right and get them filled and sprayed.
If putting a different spoiler on, you should get away with filling holes, but you may need to drill a couple more. Make a punch mark in the relevant areas, drill with small steel bit and then drill with the correct size. Treat exposed metal with anti rust treatment paint. Install new spoiler.
My personal choice is the original spoiler. It matches my mini FTO too
97 Manual GPX. Icecelle Blue.
Other Stuff: Induction kit. Front Strut. Apex Lowered. 17" Kahns. Quad exhaust. HID lights. Glow dials and rings/cups. Black leather seats. Window tints. Sunroof.