Hi all,
Thought it only right I let everyone know the outcome of my initial enquiry.
The customer had tried vinegar etc several times to no avail, I spoke to Jill from Oiltechnics very helpfull lady excellent service. The product I purchased from them (OT eight) arrived within a couple of days and I carried out the job with fantastic results. In fact the product was so good I the customer rang me back and asked if I could give them a price to clean the floor in her husbands car repair workshop which I duly did and got that job too again with great results.
Thanks to all who helped with my question.
Darren