I have kept my Naish Board cover in the back of my dual cab (with canopy) for the past few months and never used it because I put my board back in the shed after each use.
I went to clean out the tray today and noticed mould all over and in the fabric. It appears that the canopy is not water tight or condensation has been an issue on the cold mornings.
Any advice welcome! Is the cover beyond salvaging or does someone have a secret remedy to help me out.

As mentioned above its a red & white canvas type cover. The mould ranges in patches for 50c piece size to lots of smaller patches around 3mm dia. Its all over the cover on both sides.

I also had wet suit vests and fold away canvas chairs in the tray but they are OK.

So far I have been told white vinegar mixed with a small amount of dish washing liquid to allow penetration of the mild acid into the canvas fibre, no idea how long to leave it on.

Any other suggestions???