Don't know if it makes any difference but it's an advocado coloured 70's suite.
Don't think I've ever came across one as bad as this...any ideas?
Hi charlady it certainly does make a difference being older and probley discontinued it could be an expensive mistake (new bathroom suite), underneath the discolouring their could be damage, a standard approach for us would be the following
place your mop in a black bag, gently plunge the toilet, emptying it of it's contents, (gloves and eye protection) using a plastic scraper or devise (not metal) see if you can remove some of the scale or at least try and scar it, allow the mark to dry out somewhat, if it is scalant it is very porpous and when you introduce a descaler it will be instantly obsorbed and be more effective than pouring chemicals into the toilet bowl full of water and their is less chance of splashbacks on to your self or other surroundings, whether you are using a domestic or a commercial descalant use as less as possible, using this method a domestic descalant such as harpic is adequate, commercial descalants should be used with caution.
As for leaving the toilet full of chemicals for 4 hours or overnight is an absolute no unless you have tape the lid closed and put warning signs on it, despite the fact that the property might be unoccupied you may not be the only one with key access.
As well as the science of cleaning, health & safety is a major issue when using hazardous chemicals and an ongoing learning process for us all
Cheers
Richie

ps we charge £90 + vat to descale and disinfect a toilet, normally less than an hours work, trust me their is money in ..it
