I bought a tin of MDF edge sealer from Screwfix or Toolstation, not actually used it yet, but it's a thing that exists. MDF bath panels are unfortunately seemingly impossible to protect forever but I'm sure you can do a good enough job to get a few years out of it.
Where are you based? I have a track saw and aforementioned edge sealer you're welcome to borrow/use if near CR7.
@Dexter
I bought a tin of MDF edge sealer from Screwfix or Toolstation, not actually used it yet, but it's a thing that exists. MDF bath panels are unfortunately seemingly impossible to protect forever but I'm sure you can do a good enough job to get a few years out of it.
Where are you based? I have a track saw and aforementioned edge sealer you're welcome to borrow/use if near CR7.