Varathane takes longer to properly seal the MDF due to extended drying times of up to 72 hours per coat. Therefore, varathane is typically used only when other products are not sufficient for ...

To prime or not to prime MDF does not need to be primed before painting, but the cut edges should be polished by sanding with 240-grit sandpaper and sealed if you are ... should rather be sealed with ...

it needs a primer to make it a waterproof MDF. But first: sanding! Use sandpaper with a grit between 150 and 320, depending ...