I am restoring a classic car. Your combi colour looks ideal for the undernrath. However i would like to apply a stone chip over the top or leave the combicolour as the primrbprotection but concrrned when the body is painted any over spray will react ( the body will be most likely sprayed with a two pack. Ant advice
Assuming the Rust-Oleum CombiColor Original is fully cured we would recommend you test for compatibility and adhesion with any coating you wish to apply of the top on a small area prior to full application.
We would not recommend applying a two pack paint over this paint and would suggest masking this area off during spray application.