Help with old slide.

[evelyng32978079]

Hello everyone.  I am helping a friend to digitize old slides and I'm having trouble fixing one in Photoshop.  Not sure if it's worth the time and trouble but maybe you have some suggestions.  Thank you in advance.

[c.pfaffenbichler]

What is the problem – the dirt of the »double exposure«? 

[c.pfaffenbichler]

Some areas have detail in the Green Channel, so with Adjustment Layers and Layer Masks one can combine them, but some manual touch-up on a higher Layer is likely to be necessary.

And a Layer set to Blend Mode Color can be used to fix color casts.