i've got the megs 3 stage as my car aint great so doesnt need the special treatment. last time i washed it using car mit and 2 bucket method (cheap turtlewax shampoo) TWICE and i still got shit loads of crud come out the paint with the megs paint cleaner!!
felt silky smooth after too even though it was last clayed and done properly 20 months ago!!
then a couple coats of polish and a couple coats of wax.
then for the next few months or so you can wash and go over with a quick detailer thats friendly to the wax you applied.