The cleaning procedure doesn't really change with different types of wood, but always worth knowing what you are cleaning.
If you are stripping a deck of an old sealer or stain then you move into a different approach.
Main woods for decking are Pine various types, Cedar, Teak, Ipe, Southern Redwood, Iroko, etc.
The anti slip products are ok Hicksons is about the best but if you are doing a full service like we do, clean or strip, brighten, sand and re-oil then no need for an anti slip.
A lot is going to depend on what your clients want and what they want to spend on their decking, as a full restore might be to expensive if it is say regular ridged softwood boards that you can buy in one of the big DIY sheds.