How can I cut the back of an airfoil to constant thickness of 0.4mm?

 From:  simba
7023.1 
Hello,

I need to create a constant thickness of 0.42mm at the back of an airfoil (the thickness at the root and tip of the airfoil needs to be the same, 0.4-0.5mm, in this example 0.42mm as defined by the root profile). "create a constant thickness" means cut away the part that's thinner

The remaining of the airfoil needs to maintain the original cross section shape (it's scaled).

Can this be done?

S.
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