New to rotary and would appreciate your help!

gideonyoun

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Hi all,

I'm just a hobbyist that has been detailing my own cars for years using a griots G15 DA. During the holidays, I saw a good deal on a cordless rotary so I picked it up and have yet to use it. It's a Dewalt DCM849B and it came with a 7inch backing plate. I'm completely new to rotary polishers and not sure where to start. Does anyone have recommendations on rotary pads for a 7 inch plate or have suggestions on a different backing plate I should swap it out with? Any other pad recommendations? Generally, I like to stick to a single manufacturer for pads so it's easy to progress up or down in aggressiveness.

I'm also open to any other advice as to how I should be using this tool, i.e. only for cutting or only for polishing.

Thanks!
 
I use the rupes twisted wool rotary pads.

Best to keep the rotary for the heavy defect removal that the da cant remove. And then the da for the finishing work.

Sent from my SM-S901U using Tapatalk
 
Opie, you want to weigh in on the pad/backing plate diameter issue? I'll admit that I only got my rotary for taking scratches out of windshields, I don't recall that I ever used it on paint. I thought the usual advice for rotary newbs was smaller/slower as far as pad diameter and RPM, but Flash would seem to want to argue that.

I'm thinking the OP doesn't really want to be learning with a 7" wool pad unless he's doing a gelcoat boat or RV.
 
Opie, you want to weigh in on the pad/backing plate diameter issue? I'll admit that I only got my rotary for taking scratches out of windshields, I don't recall that I ever used it on paint. I thought the usual advice for rotary newbs was smaller/slower as far as pad diameter and RPM, but Flash would seem to want to argue that.

I'm thinking the OP doesn't really want to be learning with a 7" wool pad unless he's doing a gelcoat boat or RV.
Im no rotsry master, thats for sure. But i say Lower rpm and bigger pad. I run a 6.5 inch backing plate with the 7.5 inch rupes twisted wool pads. I run speed 3 on my flex which i think is 1200rpm. Use pressure for more cut when needed

Sent from my SM-S901U using Tapatalk
 
Thanks everyone!

I went ahead and bought a 5 inch backing plate just in case.

Is there really a big difference in DA pads vs rotary pads? I have a ton of pads for my DA, ranging from LC CCS pads, Griots boss foam pads, and Griots boss microfiber pads (red back w/ black microfiber). The latter was my favorite all around pad that I would use for regular 1 step maint. I'm very curious if any of these pads can be dual purposed for my rotary.

If not, I was thinking of getting some rotary specific cutting pads like the CCS Rotary for medium corrections and then use my DA with existing pads for polishing/finishing.

Is this a horrible idea?
 
AFAIK you should be able to use your DA pads on a rotary. Just be careful with the MF ones that you don't put too much heat into the paint, or the pad.
 
Microfiber pads are for da only. Look for pads that are made more for rotary work to withstand the heat and abuse

Sent from my SM-S901U using Tapatalk
 
Thanks for all the input.

I went ahead and purchased LC Purple wool pads to use for cutting and I'll stick with my DA to follow up.
 
Just to chime in, the rotary polisher is an awesome tool, you just need to invest some time behind it to learn how to make it dance on paint.

Wool pads, or more generically, fiber pads, always offer more cut on any type of tool, so just don't stay in one place for too long as you'll heat-up the paint and this can lead to burn-throughs or twisting of the paint.

With traditional wool pads, I'll tend to go-up-on edge to make controlling the rotary easier. I know some people say you should always hold the pad flat to the surface and there's nothing wrong with this, but as the pad becomes more wet with product, the pad will tend to GRAP the paint more and if you're trying to hold the pad flat you get jerked around.

When I teach boat detailing classes, it's really easy to show/teach how to go-up-on-edge because for the most part, it's impossible to hold a wool pad FLAT to the surface of a boat hull. It's pretty easy to hold a spinning wool pad flat to the surface with the fibers are dry, but once they become wet or damp with product, it's going to be a lot easier on you to buff for HOURS if you learn how to go up on edge.

Here's a couple of pictures from my recent February class. This is Veronika learning how to buff out the window frames using a wool pad on a cordless FLEX rotary polisher.


Window Frames
A tricky area to buff on any car are the window frames. The paint on the window frames looked just as bad as the paint on all the rest of the body panels. This means, in order to remove all the swirls, scratches and sanding marks, we'll need to buff these areas with the wool pad on the rotary with the Dr. Beasley's CoreCut NSP Primer.

Here's Veronika tackling the window frames like a BOSS!

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If you look at the below picture you can see the guys holding the wool pads flat - so yes it can be done - especially when the wool pad is fresh/clean/DRY.

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To make it easier to buff for hours, which is how long it would take a SINGLE person to buff out this large 2-door sedan, it's going to be a LOT easier to go-up-on-edge. You'll do the same type of work, that is remove deeper swirls, sanding marks, scratches, water spots and oxidation, it will just be easier on you.

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Same thing in the picture below. This person is holding the pad on edge as he buffs the concave curve of the hood panel.

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And yes, the paint on this 1941 Chevy Streetrod was in dire need of a good compounding.

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The above pictures are from my recent 2-day class here in Stuart, Florida. The class starts at 7:30am sharp and after a waterless wash and claying the paint on this old 2-door Chevy, the class STARTED the first day learning how to use a rotary on some other dude's streetrod. Pretty cool.

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I have another 2-day class taking place on Friday May 2nd and Saturday May 3rd at the American Muscle Car Museum in Melbourne, Florida. My co-instructor for this class will be Jason Rose and Sara Coleman-Leinhart.

I have 6 amazing training cars for this class including a 1968 Camaro and a 1962 Chevy Biscan Pro Street for the Saturday portion. On Saturday, the class will learn how to hand wet sand and machine sand these two cars, followed by using rotary polishers and orbital polishers and of course, each car will be ceramic coated.

Mike Phillips
 
Mike!

It's funny, when the OP posted this thread, I thought to myself "boy there was a better forum for him to post this question on"...but you wound up helping him out anyway(y)
 
Mike!

It's funny, when the OP posted this thread, I thought to myself "boy there was a better forum for him to post this question on"...but you wound up helping him out anyway(y)

As you know, I have a fairly cool sanding project I'm working on right now. It's this 1977 Pontiac Can Am.

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It has uniform horrible orange peel throughout each body panel.

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After I finish all the sanding, I'll be using a rotary polisher with a wool pad to buff out all the sanding marks. So I was thinking about shooting a LIVE YouTube broadcast for some of the sanding work and then the rotary work. It's the WORST color to use for training, but it's what I have and I always use what I have.

Once I'm done, she goes in for the factory orange pinstriping like you see on the 1977 Pontiac Can Am in the collection of cars at the American Muscle Car Museum. I took the below picture last week while I was looking at and confirming training cars for the upcoming class there.

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Mike
 
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