Thank you Zonker for your super fast reply.
Seems I need to decide what to do as some of the edges are broken and I need to restore them with epoxy or some kind of artificial wood kit. When I oil these edges afterwards it won't soak I suppose. Maybe I should paint a nut structure before on it with some die cast colors ;-). I post some pictures here tomorrow. It looks similar to the edges in this thread
http://www.audiokarma.org/forums/showthread.php?t=541841
I have some more technical challenges with the crossovers as they are completely missing. Kenrick Sound does not answer to my english questions for a replacement. L-Pads are missing too. But at least I have an almost NOS active crossover JBL 5234A. These crossovers require at least a working 0,04 mH coil some capacitors and the L-Pads.
I received a mail today that someone I asked one week ago is willing to exchange 2 crossovers for one speaker cabinet as I have 3 cabinets and he only one. I just hope that I have the right cabinet double. This could be a good exchange and I will call him tomorrow.
With pickling I meen putting some kind of clear grease (color remover) on the surface and let it rest and work with the color for about 2 hrs. Afterwards you use any sharp tool to remove the softened paint carefully. It is fast and save and won't hurt the wood much. If all the paint is gone you clean the rest of the grease with water. When the surface is dry you start sanding it.
As soon as the weather outside will be more comfortable I can post here pictures too with the steps. It really works very well and is easier than sanding all the color away as you don't need so much sand paper.
I live in Europe so it will be hard for me to get the same factory black spray cans you use. So I asked for the type of black. I will give it a try with flat back and hope for the best.
Next challenge will be the grills. I found some pdf with the measures. Maybe I ask some carpenter if he can make me some. Kenrick is selling some but they are not cheap. Hopefully I will find the blue acoustic cloth here somewhere in Europe.
How can I remove the grill pegs on the front? Is there an easy way to remove the plastic cap? It will be easier to sand the front without the pegs.