Hi Jimbo,
Welcome to
RP.
Had a very quick play with your image to resolve your problem. There are a few other things that need resolving, but I haven't attempted them.
To equalise the tone, I did a loose selection round the top of his face, then copied and pasted to a new layer. Adjusted contrast using levels to get a match. Then applied layer mask, and painted away any overlap.
Lastly flattened image, then cloned along the join to hide any irregularities.
Hope this helps.