Originally Posted By: Swift101
I won't be using UC much, my primary goal was to remove some deep scratches made by the dealers automatic car wash (scratch machine). I forgot to tell them not to wash my car one time and those brushes did some damage.
Would I be able to use Meguiar's SwirlX or just Ultimate polish on a more regular basis? (Once or twice a year?)
With a finishing pad I would say Ultimate Polish would be safe to use twice a year, once if you want to be more conservative. Ultimate Polish with a DA has enough cut to remove minor defects and really finishes out quite well and is the most gentle of Meguiars polishes that actually have correcting ability and don't just fill like their glazes. Swirl-X is a little more aggressive than Ultimate Polish. Still less than M205 which would probably be as safe to use as Ultimate Polish with the right pad and technique.
Keep in mind these are SMAT abrasives so they do not diminish at all when polishing. They also finish just as well on the first pass as they do on subsequent passes. And also you do not want to overwork these polishes. With traditional polishes the longer you work them the better the resulting finish as the polishes break down. SMAT does not break down and as the lubricant flashes off and the clear coat gets loaded into the pad, the abraded clear coat starts to bind the polishing particles together resulting in marring or hazing, especially on softer paints.
The technique with SMAT abrasives is different. First you prime the pad by running a 2-3 lines across the face and spread it around by hand or by rubbing it against a panel with the machine off, that primes the pad. You then quickly spread it out then work that spread out polish in overlapping rows using an appropriate amount of pressure depending on pad selection. After the first pass you evaluate the amount of correction, even on the first pass you'll achieve the best possible finish, as in you won't get any better than that by working the polish longer. If the defects are not corrected by then, reapply a small amount of polish like 2-3 drops and go for another pass. If this doesn't correct it or possibly a third pass, basically it might be time to switch out to a more aggressive pad/polish combo.
After working a section it's a good idea to clean out the spent polish. You can wash it out and spin up the polisher to fling out the water, but this inevitably leaves some water in the pad which I feel thins out the lubricant in the polish and changes its properties and sometimes you'll find even a small bit of moisture can end up making the polish stick to the paint and not wipe off cleanly and needs some muscling off which could lead to marring. The Meguiars recommended, and my own independent conclusion, came to be that a cotton terry towel like a bath towel pressed against the pad and turning the polisher on absorbs enough spent polish and breaks up dried clumps of polish to continue using the same pad on the car while still leaving the pad properly primed.
Ultimate Polish responds quite well to pad changes but depending on the softness of your paint more aggressive pads might leave some hazing so a light polishing or finishing pad and a more aggressive compound like Ultimate Compound might work better as you've no doubt experienced. Just don't make a habit of reaching for the Ultimate Compound on a regular basis. The key here is prevention, minimization and sometimes just learning to live with a few RIDS here and there.
Also the main reason I've made the switch pretty much entirely to SMAT abrasives is this exacting control of the number of passes, and with proper technique guaranteeing a good finish even on the first pass, really puts you in control of how much paint you're ultimately removing. It's more important than ever to watch how much you're polishing.
http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3326840/The_big_deal_about_thin_paint.