Report Abuse. If you have true gel nails on then yes you can polish over them. However it will not make them last longer as true gel nails are permanently attached to the nail and must be filed down to be removed.s the Gel is porous the nail polish will soak in just enough for it to grip to the nail. Best thing to do would be to remove the Gel top coat but painting straight over it will be fine. When we paint our natural nails they have a lot of flex in them and they also can get quite oily.