Never ever ever ever use a sponge! Get yourself a good quality lambs wool mitt. Two buckets with grit guards are best - a wash and a rinse bucket. I have yet to find products that are pound for pound better and more convenient to find than Autoglym. AG super resin polish, ultra deep shine and HD wax are all really good products in my eyes but detaling is very much a thing of opinions. Nilfisk make some very good powerwashers too. Screwfix direct do some good offers on those too. I could go on. Detailing world (forum) is very useful but is over full of information really!