Thread: How to stop Mould?

Here is a sheet of MDF as a door in a garage, it has been oiled with BLO, but yet the mould still grows. I am just about to throw it and other cabinet mdf coverings away due to the nastiness, but how can I protect surfaces from this nasty little critter.

To give you some insight, m garage, is in effect a carport with a very airy garage door,ceiling high fence on one side, brick wall on the other and open at the rear. The air flow is so good that I never though this would happen.

Short of painting it all with paint containing microban, how can I stop this from happening, if anything? and short of never using MDF again, which will be my preferred option as it does this and absorbs all moisture in the air.