If it's already painted, then it shouldn't matter much whether you use primer. I would remove any loose paint and primer any bare areas. I use Kilz too.
I was wondering if you could help me with something -- I have an entirely oak kitchen. I know it's the rage now to paint or gel stain cabinets. I've been considering ...
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I have a white plastic 3-shelf Walmart basic shelving unit that needs paint or something to blend in with a blue shower curtain and bathroom accessories. What kind of...
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Kathy....I like Kilz primer
Yes Kilz & Zinzer both make primers that bond to plastic. Since they each make about 5 formulas, I would read the labels.