A few years ago a friend painted an image on my fridge. He was sent away (with work) and never got to finish the job. My question is what sort of varnish or clear finish should I use on my fridge in order to seal in the image? Also I believe he was using the little pots of paint with which you use to make models. Does anyone know what sort to use ( I am thinking a Matt finish ) As it has been some time since it was painted I just want to touch it up and then seal it in for good. Any help out there would be greatly appreciated.