using auto paint on boxes

[busterno1]

Do I have to use a sealer first on the mdf then primer or just the primer ?

The sealer I was thinking of using is watered down pva glue

Or is there something else I can use that is cheap.

Thanks

 

[richie00boy]

Buy MDF primer. I think you can mix PVA with water-based wood primer too, or maybe it's 50/50 water/PVA...

Anyway, don't try using 'normal' primer on MDF. I did, and I used about 3 times more primer than necessary because it just soaks it all up. I have also tried car primer in an aerosol and that was even worse.

 

[JOE DIRT®]

marine resin works really well😉

 

[Jim85IROC]

Where can you get MDF primer? I've already soaked 2 cans of automotive primer into my .2 cubic foot MDF boxes, and I've still got a LONG way to go at this pace.

 

[MCH]

I heard using artist's Gesso paint (used for priming canavas) for primer was the way to go for MDF.

 

[dhenryp]

I've had good luck with a 50-50 mix of water and regular yellow carpenter's glue.