striped camshaft

Who can inform me about what problems cause the operation of the engine when the two camshafts their axes have scratches in the direction of operation. They are located between the spaces between the cams?

What happens if the trees are scratched in the rotation supports is a symptom that dirt enters the lubrication circuit and has worn out these and what is worse; The supports of the cylinder head If this is of aluminum can be degraded at each start (when there is no oil pressure) and cracking material of it, over time there may be a loss of greasing pressure due to this slack and end up in a grip of the tree ... (to change the cylinder head) if the scratches are not very deep. aluminum. Apart issue is whether the cams are scratched, here you can not do anything to soften scratches because this means that the cementation or hardness layer on the cams surface has already been lost and they will also make their wear to the taques and the consequent destruction in the cams ... I have a tree to take photos if I can ... I already know it. Greetings!!