Quote Originally Posted by wilfy View Post
oh i know all the downfalls of not sealing mdf, i'm using filler primer to start with get it nice and smooth before i even touch it with black.
Nice job with the desk especially liking the circle jig. I'm currently building a car shaped bed for my son and made a similar jig for the wheels and rims. Wish I had my cnc router built already.

Anyway, I wanted to ask which filler primer you are using to seal the edges of the mdf. Its a big search topic and so many different opinions. Some recommend pva glue, some wall filler, shellac, zinsser bin primer, oil based primer. Confusing or what. I've decided to go with a quick drying water based primer from toolstation made by Flag. It is suitable for spirit based paints as I want to paint with gloss for its strength.

My procedure is to paint primer, sand with 120, primer again, then sand with 240, paint gloss, sand with 320 then final coat of gloss.

Thanks Adil