Here's my method ( if your not 'into' car cleaning you may need to look away!) I first go around the car and rinse any loose dirt off using a 5 litre garden sprayer (hot water and shampoo) I then spray it all over with Autoglym Magma, this stuff is great, loosens any iron particles and turns blood red as it works so you are able to see just how much carp was on the paint.
I then give it a good hand wash using a noodle mitt, traps dirt rather than spread it around as a sponge does,after a rinse I then begin claying by wetting a small section of a panel with a spray bottle filled with water and a tiny drop of shampoo and using a thumb size piece of clay flattened out work my way over the panel, you can hear and feel the clay trapping contaminates so you need to be constantly turning the clay (use a fresh piece as soon as it becomes dirty all through) and always go back and forth rather than round and round. After a panel is finished I wipe it over with a wet micro fibre towel and move on round the car.
I don't generally polish afterwards as my paints in good nick but I've done a couple of cars that needed it and I use Autoglym super resin polish, it's nice and gentle..
Now the paints ready for wax, I use turtlewax triplewax, it's at least as good as more expensive brands, I apply it with a damp foam applicator and buff up with a long fibred sheep skin towel ( I forget the brand!).
Incedently I clay the whole car including the plastic trim and glass, large sections of trim get a coat of Autofiness "revive" (wear gloves, it's the the most slimey stuff imaginable) the glass and tricky bits of trim get a tiny spray of Autoglym aquawax, a little goes a long long way.
I use Autoglym "pure" shampoo along with there clay ( red and white tin ) as it's very gentle.
Apologies for all the product placements but these are the things I found to work, some car cleaning wonder products are snake oil imho.......
I suspect the marks you can see are due to doing a large area at a time or clay residue,
Edited by paul 1963 on 08/02/2020 at 12:05
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