QUOTE(TheEvilMan @ Jan 7 2015, 08:28 AM)
I enjoy the claying process, but then i just realise it might cause swirls and marring according to people here and some research on the net. So i wonder how to keep the car clean without any spot while not causing any swirl, i dun wanna polish the car as much as i can since i know polish is the last resort to renew the paint as it will strip a layer of it during the process. Constant waxing is what ppl recommend but then waxing also cause swirl??

How do you keep your car in good running conditions? With PROPER maintenance using PROPER products and PROPER method. Same goes with keeping your car's appearance. Before that, please take note, there is NO WAY to PREVENT swirls and marring from forming, but what we can do (with proper maintenance) is to MINIMIZE them from re-occuring. The risks of causing swirl is there the moment you touch the paintwork with something.
Now, first thing I would advice is to concentrate on your washing and drying, both on the techniques and products, especially the wash mitt/media and drying cloth. These two contribute THE MOST for self-inflicted swirls and marring. You can spend a whole day polishing and waxing your car's paint to perfection and in less than half an hour (send to 'bangla wash') and all your hard work will go down the drain. Remember, when you're washing your car you're actually REMOVING all those contaminant/grit from the surface of the paint and transfering them ONTO the wash mitt. Therefore, most importantly, you DO NOT let that wash mitt with those swirl-inducing-grits touch your car again BEFORE they are released/removed from the wash mitt. Same goes with the drying process, you're WIPING the paint with a drying cloth so you'd need to make sure that you MINIMIZE any chance of dragging any leftover grits across the paintwork. For both, there are quite a variety of methods/techniques...there's actually no right or wrong...just use common sense. The key is STAY CLEAN.
Now, for claying. You don't really need to do it that often if you have a proper and regular maintenance (wash) schedule. I'd say once in six months would be more likely. Just 'feel' the surface of the paint and notice how 'gritty' or çoarse' it feels...just clay when you'd NEED TO and not when you WANT TO. Remember this, claying is for removal of EMBEDDED grits, it's not for removing those dirty stain/runs or the like, from the paint. Also, claying won't remove any paint but it would, like you said, cause clay-induced swirls/marring that might necessitates polishing. Oh...and if you're polishing by hand or a machine with a mild/light polish...don't worry....it'll take lots of rounds of polishing to thin the clear coat to the point where you'd need a repaint. But if you're really OCD about polishing the paint off, then back to my first suggestion, take the 'preventive actions' route and minimize the risk of causing them in the first place.
Waxing cause swirls? Again, WORK CLEAN. Contaminated applicator would cause swirls; waxing a dirty surface would cause swirls; using a contaminated cloth when buffing would cause swirls; etc...etc. Swirls are caused by dragging grits across the surface of the paint. Minimize that and you'd minimize causing them swirls.....
Ragards.