i personally dont use the interior painted method ,
when i use those, i grind done what i can with a dremel tool, then use different sand papers(a medium and a fine), in order to prevent flaking u have to sand it anyway , then spray it with flat white, , puils are up to u , use your imagination,painting them is fine, for quickies i use the small sticky backed felt dots u can by at most hardware stores or at CVs, or walmart, they are for preventing scractches on tables