As Pete says you can drill out the spot welds, but they're pretty big and there's always the problem of re-welding. Gentle angle grinding does the business and if you take a tip out of Haysey's book as I did, you can pop rivet the new panel in place.( they cost about £80) The big bonus is you can take the panel off easily if you are doing anything major such as removing the engine or taking out the charger.