Can someone please help with a bit of advice, I have just got my first commercial contract the company has been without a cleaner for a couple of weeks. It is a busy metal fabrication workshop with all the usual workshop grime, oil etc, the problem I have is the toilet seats or rather underneath the actual seats are ingrained with what I assume must be oil how I don't know. I have tried the usual loo cleaners and scrubbed away but nothing is shifting it...could it be permanantly marked now or is there hope?
many thanks