Priming MDF

Postby diynewbiesos » Thu Apr 09, 2009 9:28 am

HI all,

My brotherinlaw made a fish tank stand and hood for us the cabinet doors and hood panels had to be made with MDF so as not to warp, I was going to prime it but was told a few coats of paint was all that was needed WRONG, after having quite a few coats of paint it looks streaky and horrid. The fish tank and stand is 6ft so its a lot of messy paint work to look at lol :lol:

My question is can i use a primer on it on top of the paint thats already on? would that do the trick?

Thanks in advance.
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Simply Build It

Postby TheDoctor4 » Mon Jun 02, 2014 11:06 am


In all honesty it is probably best to rub it all down and start again, using the correct primer/sealer at the base stage and then a top coat once primer is dried. We do have a project page that walks you through the process here:

Kind Regards

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Postby Cook85 » Thu Jun 05, 2014 1:13 pm

I'd just sand it down, not to necessarily remove all the paint, but then put a good primer on and re-paint it. Bear in mind gloss paint needs to be spread quite thinly so that it doesn't streak.
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