You can, however, it isn’t developed for this purpose and so we wouldn’t be able to advise how effective it will be when used in this way. Auto-Wash is designed to be used in a bucket. Auto-Foam, Touch-Less and Surfex HD are all designed for pressure washer use and will be more effective for touchless …
Yes, Auto-Wash can be used at the same dilution rate as to be used on paintwork on a soft top.
The standard instructions for Auto-Wash are to put 5ml of Auto-Wash in a bucket, and fill with up to 10 litres of warm, fast flowing water to generate a lather. The suggested dilution ratio is 1:2000.