Thank you for your reply and information and words of encouragement! Thankfully the neck all looks in good shape, as do the frets and fretboard so I think (hope) you're right in that it's mainly just damage to the paint finish. I've filled the electrics with rice and will test those in a week or so,...

My heart is broken... We're having some house renovations done and my beloved '97 Parker Fly Deluxe sat in its soft padded case in a pool of water about 10cm deep (in a shower tray) for around 24 hours... I'm devastated as I've had this guitar for 25 years with barely a ding! The case soaked up most...