3M Perfect-It III Extra Cut Rubbing Compound (-05936) and paint repair

M

Matell

New member
Hi, I'm very new to this game, and am wondering if I've been conned.



I have a 6 month old dark metallic grey Jap car that doesn't seem to have the toughest of paint. As a result of a few stone chips, a falling kiddies trike, and a plaster leg cast I have a few areas on the hood, bumper cover and side skirts that I hope to get rid of using the chip removal process detailed on Bettercarcare.com



In that process it's recommended to use 3M PI-II Rubbing compound. So I went to my local automotive paint specialist to look for it, and all they had was Perfect-It-III Rubbing Compound 05933 and PI-III EC RC 05936. I wasn't sure which was better and asked the service guy's advice. He recommended the Extra Cut, which turned out to cost almost twice as much as 05933. I've had a look through the forums here and it seems the consensus is that Perfect-It III Extra Cut 05936 is pretty abrasive stuff.



Will the Extra cut be suitable for rubbing down 24-48hr cured touch up paint, followed by some fine cut cleaner, then a paint polish and wax? Or is it much too aggressive for hand rubbing these relatively small regions and lead to extra unwanted marring, and I've been had?



:confused:



I'm not sure whether to take it back and exchange it for 05933 plus whatever other products they have to make up what I paid, or give it a try first on the painted undersides of the body at which point if it's too nasty I might have trouble getting a refund.



:nixweiss



Thanks
 
Perfect It III Rubbing Compund (05933) is slightly less abrasive than Perfect It II Fine Cut Rubbing Compound. 05933 will work just fine for what you need. The Extra Cut is much more abrasive and I would not recommend it.



In the article you read on Bettercarcare.com about chip repair David wet sands the touch up paint and then uses Rubbing Compound to remove the marring caused by the wet sanding. It sounds like you want to remove the touch up blob of paint with the Extra Cut than follow up with the Fine Cut instead of wet sanding first. I don't know how that will work.
 
Thank's that's the type of answer I was after. :) Either the Extra cut will or won't be a good substitute for the Perfect-It II Fine Cut rubbing compound.



I was planning on following David's method to the letter provided I could locally source the same products or close enough too. I just didn't write my intentions clearly enough. Sorry about that. So I didn't plan on using the extra cut in place of wet-sanding, I was hoping it would replace the Perfect It II rubbing compound, and then after using the Extra Cut in place of PI II if there was still some maring I'd use some Meguiars Cleaner I already have. I had no idea if that'd work though.



Guess it looks like I'll be returning to the autopaint place and seeking an exchange or refund for the 5936 with 5933. That will make it much simpler and less likely to go wrong I hope.



I got had by a salesperson!



:angry



gotta hate that!

:o



Cheers
 
Yeah, take that 05936 back and get the 05933. The 05936 is some really nasty stuff. Even with a rotary, it leaves some very severe marring. By hand/PC it's just liquid sandpaper (and a coarse grit sandpaper at that). I'd *much* rather use some 2-3K sandpaper (get the Meg's stuff) or a similar grit sanding block. In fact, that's how I do my touch-ups :D



Sanding block, then 05933, then 05937. Works very well.



The 05933 is a great product. Be sure to break it down all the way and then you'll only need a light follow-up with a milder product. I know some less-particular people who don't even follow up with anything (but I sure would).



If you don't already have some, get some PI-III MG (05937). Pretty mild but it still cuts. Probably the most versatile abrasive 3M makes, wouldn't be without it myself.
 
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