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TOGWT said:Porter-Cable's powerful polisher is the big brother to the outstanding 7336SP. The 7428 is a variable speed circular (rotary) polisher. It boasts features such as a speed-limiting dial wheel, variable-speed trigger, lock-on switch, and a hook and loop backing plate. The speed-limiting dial wheel and the variable-speed trigger work together for maximum control and flexibility, simply set your upper-limit and pull the trigger, you can then control the actual speed just by increasing or decreasing pressure on the trigger. No need to worry about going faster than you’d like.
Circular polishers like this are typically used to compound, level, and polish and remove swirls. Because it's a direct drive tool, it is dramatically more capable of removing small paint particles. They are not used to apply wax or sealant/protectants (although some waxes, sealants and protectants can be applied with a high speed machine you are better off using it’s little brother the 7424 random orbital buffer). When applying a compound and polish, I have found most products work best in the 800 to 1,100 rpm speed range. This is a very safe speed range to stay within, able to remove most swirls and paint defects in this speed range and will not create swirls or burn the paint
I have resisted writing a guide for the use of a high-speed polisher in the past because they can remove and/or burn paint and create swirl and buffer marks if used improperly. A high-speed polisher actually removes the swirl by removing the layer of paint down to the lowest point of the swirl. With a little patience, practice and common sense, an enthusiast can master the skill needed to create a swirl-free, mirror bright finish. Staying within the speed range of 1,000 – 1,500 rpm, providing you are careful not to hold the pad in one place for too long, and paying attention when you come to the `edge' of a panel or a body contour it will not cause any damage or paint burn. Staying within this speed range it's pretty much idiot-proof (I can use it, what does that tell you)
An HS Rotary is a ‘must have’ for the professional detailer as it will remove surface blemishes faster there by saving time / effort. Although I’m not a ‘professional’ detailer I do use this machine to detail high-end show cars
Knowledge; [and the proper methodologies are the key to correct automotive detailing]
ca8680 said:thank you......:righton:
i have yet to come across someone with great info on that subject, until you..... i dont want to bad mouth any other forums but thank you.....
i also have heard that suposubly they brake down or something like that, is there any truth to that? any complications with yours?
so would it be good under professional work?, 1 car a day since i would be barely starting......i need to train on my cars though....
abrcrombe said:You definitely want a lot of practice before you use a rotary on a customer's car. Go to the junkyard and pick up some doors, hoods whatever you can find to practice. The better you are, the safer you will be. Remember this thing can burn through clear and paint really fast. A PC 7424 is very safe and won't cause damage 99.9% of the time, but the tradeoff is the time it takes to break down the polish. What is your detailing experience and is this going to be a full time job or a side job??