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Super Member
Re: Rotary VS Dual Action for Compounding
The new blackfire aio can remove heavy sanding marks so I'm just saying, the technology is there to save time and get good results.
I think it comes down to paint preservation. Leave as much paint on the surface as possible.
2016 Mazda 3 Sports GT
2015 Lexus IS250 F Sport
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Super Member
Re: Rotary VS Dual Action for Compounding
Originally Posted by DBAILEY
You need to remove the same amount of clear coat to make a defect disappear no matter if you use a rotary, forced DA, long throw DA or normal DA.
Exactly my point. So if it is needing heavy compounding and a 2 step process. A rotary first followed by a DA is the most efficient.
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Super Member
Re: Rotary VS Dual Action for Compounding
Originally Posted by DBAILEY
You need to remove the same amount of clear coat to make a defect disappear no matter if you use a rotary, forced DA, long throw DA or normal DA.
Yes, you are correct. But what I'm saying is because of the speed of a rotary, you will likely level the surfaces to beyond what was needed to correct it.
2016 Mazda 3 Sports GT
2015 Lexus IS250 F Sport
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Re: Rotary VS Dual Action for Compounding
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Super Member
Re: Rotary VS Dual Action for Compounding
Originally Posted by WillSports3
Yes, you are correct. But what I'm saying is because of the speed of a rotary, you will likely level the surfaces to beyond what was needed to correct it.
You are assuming that someone is making a mistake with a rotary but not with a DA. Let's take mistake out of the equation by saying the operator is proficient.
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Super Member
Re: Rotary VS Dual Action for Compounding
I am assuming the operator is proficient. I'm just not assuming the operator is perfect. I'm not saying the rotary is not a necessary tool but the rotary really shouldn't be the first thing a detailer goes to, especially on a factory paint job that someone from the dealership has already buzzcut with a rotary.
2016 Mazda 3 Sports GT
2015 Lexus IS250 F Sport
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Super Member
Re: Rotary VS Dual Action for Compounding
A modded 21, 5" plate, xtra cut megs mf pad, m100... Yeah, give me the wool / rotary. I don't want to see bare metal.
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Super Member
Re: Rotary VS Dual Action for Compounding
There are times when I do a few test spots and determine my rotary and wool is needed. For example, I might do 2 test spots with my Flex 3401 and increase the aggression with the second test. If the second test is an improvement but not yet enough it's rotary and wool time. The last time in recent memory was a black Cad Escallade swirled to high heaven. The paint was very hard. I also do not remove any more paint than is necessary to level defects. By my 3rd test spot I have a pretty good idea how deep I need to go...safely.
Yup, I could continue with my Flex and work my butt off and get similar results but time IS a factor and there are those times that a rotary and wool are needed. When I do that I have instantly gone to a 2 step job to correct.
I can't remember the last time I needed more than 2 steps to cut and polish. The equipment and abrasives are that good now. They are so good that I am doing a lot of 1 steppers. Most of my work is done with my Flex 3401...whether 1 step or 2. BUT, when faced with hard paint and needing to cut down faster I always reach for my rotary.
And yes, I know how to use both. It's just that the Flex does almost as good as my rotary especially with today's products. "Almost as good" means I need to go rotary to save time ON SOME JOBS.
Having said all that, I agree that on certain jobs I cut with my rotary and refine with my 3401.
Good discussion btw. I enjoy other's perspectives.
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Re: Rotary VS Dual Action for Compounding
Imo Rupes and microfiber/wool beats rotary in terms of cutting power unless you use those 10 inch knitted woolpads. I hardly ever compound with rotary but i sometimes like to finish with it just for fun and change.
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Super Member
Re: Rotary VS Dual Action for Compounding
Originally Posted by Joel1979
Imo Rupes and microfiber/wool beats rotary in terms of cutting power unless you use those 10 inch knitted woolpads. I hardly ever compound with rotary but i sometimes like to finish with it just for fun and change.
If this is your claim, then is it correct to say that the Rupes possesses the same or more risk factor as that of a rotary since it has better cutting power?
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