my brothers the same, wont do a thing on his mini unless someone else starts, then he gets involved.
i suppose as long as the bolt holes line up with the wing, and the headlights fit, then it doesnt matter if its creased etc. cant expect perfection, but get the panel gaps right and thats better than most people would do.
planning on panels get sprayed proffesionally i hope? rest of the car is mint, be a shame if it wasnt mint again in the future.