Oh jeez what is marring? So not too much pressure and keep panel and clay wet.
Apologies to the OP i'm a proper nube also to detailing hence the questions, hope they help the OP also.
So wash, clay, wash then wax?
marring is basically where the clay marks the clearcote/paint where either a too aggresive clay is used and the panel isnt lubed up enough.
keep the clay supple by warming it, keep the area your claying lubed up;)
no need to appoligise mate:) thats what this forum is for;)
yes wash thoroughly,clay, wash over again to remove clay lube/crap etc.