First the car is now lowered 35mm, the suspension would travel back and forth past this height in its suspenion travel and now all that is different is that it will start from this stage in suspenion travel rather than further up
the rear wheels are on trailing arms that are attached to rear beam (horizontally) so if you removed the spring completely the arm would travel up and down not effecting the camber, the reason most ppl end up with more camber angle is if the rear trailing arm bushes wear (making arm sit at angle rather than horizontally) or the wheel bearing being f**ked (making the wheel camber more and not sitting horizontally).
the front suspension can be adjusted by loosening the 2 bottom strut bolts and pushin the top of the hub in towards the car (giving more camber) or pullin top of the hub outwards (giving less camber). But even that been said they should have enough play in the bolt to move the camber back to factory camber settings, the main thing that the face of the wheel (while facing the forward direction) should be at the same angle as the factory wheels. which i dont see why they couldn't do it lol, maybe to much thinkin for them as lots of cars get their alinement's done after lowering and other garages do it and dont winge about it..............
What mk you got?