Watco or resincoat do some very decent solutions for that but it is a hell of a lot more prep and faff than sticking up hygiene board over what is thereYou could look to fibre glass the inside, a bit like a milking parlour.
I thought it might be. The hygiene board is floppy old stuff but if stuck to osb it's not too difficult to put up. I cut it with a circular saw with just about 5mm blade sticking out.Watco or resincoat do some very decent solutions for that but it is a hell of a lot more prep and faff than sticking up hygiene board over what is there
I did the same. Much quicker /neater than a jigsaw which is what I tried the first timeI thought it might be. The hygiene board is floppy old stuff but if stuck to osb it's not too difficult to put up. I cut it with a circular saw with just about 5mm blade sticking out.