K render advice pleeeeeez

Hi guys Im after some advice if i mayive been asked to k rend over s&c that has been painted over and is very smooth finish.Im using the thin coat system that ive used many times on new builds and ewi but never over painted render.What would you recomend as a primer before applying base coat?TIA


TPF Special Forces
on painted render our choice is Parex Parinter . nice to apply.