Shaun
Have you tried our cleaners and if so which one?
As you are so close why not come up on one of our courses and find out how we operate. Everyone is welcome.
Dave
It really depends on what you are trying to clean as to what results you will get. Micro cracking in pigment can often be mistaken for dirt. If you have micro cracking and do not identify this it could appear that your cleaner was not working very well but this type of discolouration will not clean out with anything, this is where a microscope comes in so useful and is an essential piece of equipment.
Some cleaners will appear to do a very good job but will actually be damaging the finish which then leaves it looking very clean but will cause problems in the long run.
Cleaners should be water based and contain no oils, waxes, silicones or solvents and the safest way to use them is as a foam. Cream cleaners collect in the grain pattern and do not remove the dirt unless they are 'cleaned' off!!
Hope this helps
Judy