In the case where there is paint or nail polish on those limbs which are washed in wudhu, it has to be removed in order for the wudhu to be valid. If the actual coat (of nail polish/paint) was not removed and only water was poured on it, wudhu will not be valid.

أفضل التطبيق العصري على مسائل القدوري

للمفتي محمد أشرف الاشاعتي

Vol.1 Pg.91