We do not advise this, as it creates a surface that will make for poor adherence to the paintwork, rather like painting over a greasy surface. It will not cause a problem, however, the finish will not last as long when Double Speed-Wax is applied when a wash and wax product has been used prior to application.
Can I use a ‘wash and wax’ product to wash my vehicle before I apply Double Speed-Wax?
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