If the mini Pf were mine id be cleaning her up.
Heres what i would do.

A VERY light sand

Clean up with meths and ME - same as you would ball swirl to remove most of the dirt from the cracks.

Then a very light colour wash on each of the colours... this is a very thinned out wash of paint.. it makes all the imperfections disappear and will colour the planking cracks.  I normally do this with a very soft sable brush thats not dripping but its not dry either... it leaves no brush marks

Then a CC.


 PF will look like new again