Today, I stripped the paint of the reardrive from my v11 le mans. It's a very easy proces. I just used ordinairy paint stripper, as bought in any hobby shop. After the first time I got 90% off, the second time the rest. So now I have pure aluminium. I let it sand blast, and then it's more than new.
One thing to watch, when I dismanteled the v11 , I found the bolts from the joint connection to the gearbox were lose. A thing to check. Mine has only 2500 km.