First thing I had to do was to remove all of the corroded components.. no easy feat as with this amount of corrosion as anyone who has ever done this will know! However some careful sanding with a Dremel with a small sanding disc attached made easier work of it. I sanded back some of the solder, then heated the joint while adding some new solder to help melt the old solder, most of the parts I just cut the leads to remove the part in question then heated the solder and removed the cut leg with tweezers. With all of the parts removed I  desoldered all of the component holes using an ordinary desoldering pump, then cleaned the traces with the Dremel.. being VERY careful not to sand thru the traces!!

 Also I had to remove the socket for U8, I simply put a series of cuts into it with the Dremel and a cutting disc, trying not to cut too deep. Then I simply heated each pin and removed them individually.
As luck would have it, I DID manage to damage a couple of traces which I had to repair later. I used strands of fine wire for this.

Sorry but I didn’t get any pics of the board with the components removed! But once I had the copper cleaned I sprayed on a couple of fine coats of printed circuit board lacquer to prevent the tracks from tarnishing up.