Wash
clay
quick wash again
cleaner
polish
seal with jetseal109 very good stuff

wax twice
get some applicator pads if your applying polish by hand it will give you better and a more even contact with the surface. 80mm spot pads are good for useing by hand and come in different grades.
if your gti hasnt been clayed for 2/3yrs then repeat the whole process above really, start a fresh basically