Just wondering what potential there is if from chipping my 2014 2.0 ltr, 150 hp Octavia estate? Tia.

Do you mean what sort of gains might you get from fitting a tuning box or from having a remap?  The latter is more effective than the former.  

 

A good remap on a 150 TDI should give c. 180 - 185 bhp and c. 400 Nm of torque.  I have this engine in my Yeti and a good remap has certainly improved the performance. 

 

You can, of course go quite a bit further than this by fitting a bigger hybrid turbo, bigger injectors, etc. 

The potential of the panel rusting if you dont apply touch up paint promptly.

Chipping the paint off will undoubtedly make the car faster. 😄