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  1. #1
    Director of Training Mike Phillips's Avatar
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    Best Practice - Avoid buffing on top of body lines and edges

    Best Practice - Avoid buffing on top of body lines and edges


    Buff up to body lines and edges but try not to buff directly on top of body lines and edges

    A good best practice whenever you're machine cleaning is to buff up to hard body lines but don't buff on top of hard body lines. There are two reasons for this,

    1. Paint tends to flow off high points a little after it's sprayed but before it's set-up, so paint will tend to be thinner on edges and body lines.

    2. There will be increased pressure from your pad onto the paint because the body line or raised edge will be higher than the rest of the surrounding paint.

    This is what can happen, if you look carefully at the hard body line on the hood of this VW you can see where someone has remove too much paint and exposed the primer under color coat. This is an older VW and has what appears to be a single stage finish but the principal behind avoiding buffing directly on top of an edge or hard body line still applies.





    This is a little out of focus, sorry I was using my iphone...



    As Benjamin Franklin once said, an ounce of prevention is worth a pound of cure.


    A good best practice is to avoid buffing on top of hard body lines and edges and instead just buff up to them. You can also tape them off using thin painter's tape so in case you get your buffing pad close to the raised body line or edges you have a measure of extra protection.

    This is where either slowing down and focusing on the task at hand comes into play or using smaller pads when working on thin panels.

    Here at Autogeek we have a great selection of smaller buffing pads and backing plates as well as the Griot's Garage Professional Random Orbital 3 Inch Polisher for working thin panels.


    Lake Country Beveled Edge 3.5 Inch Pad Pack



    Griot's Garage 3 Inch Orange Polishing Foam Pad



    Griot's Garage 3 Inch Mini Red Wax Pad



    Griot's Garage Professional Random Orbital 3 Inch Polisher



    2-3/4 inch Hook & Loop Rotary Backing Plate




    D.A Adapter 5/8" X 11



    Lake Country 4 Inch Low Profile Foam Pads



    CCS 4 Inch Spot Buffs Foam Pads & Accessories



    3.5" Dual Action Flexible Backing Plate


    Rotary 3 ¾ inch Backing Plate



    Mike Phillips
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  2. #2
    Junior Member eddie6th's Avatar
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    Re: Best Practice - Avoid buffing on top of body lines and edges



    Painters tape!...Where would I be without it.
    'Pearly Gates'

  3. #3
    Senior Member MisterShark's Avatar
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    Re: Best Practice - Avoid buffing on top of body lines and edges

    Great tips for someone like me whose on the verge of buying a PC and would like to be forearmed with a bit of advance knowledge.

    Keep em comin Mike!
    James

  4. #4
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    Re: Best Practice - Avoid buffing on top of body lines and edges

    Nice write up. I have used those 4inch spot buffs many times, life savers for tight spots.

  5. #5
    Senior Member Gary Sword's Avatar
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    Re: Best Practice - Avoid buffing on top of body lines and edges

    Good Advice! Sometimes I even tape an edge that's hard not to hit.

  6. #6
    Senior Member DLB's Avatar
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    Re: Best Practice - Avoid buffing on top of body lines and edges

    Been wanting to pick up some of the 4" pads and backing plate - just got to get my funds built back up.

    DLB

  7. #7

    Re: Best Practice - Avoid buffing on top of body lines and edges

    Maybe I'm a bit late to the party, but how do you guys buff body lines and odd panel contours? I tried polishing a friends Nissan Hardbody pickup with my PC, but it has a sunken channel right through the waistline that I couldn't get even w/ a 4" pad. Any tips for dealing with this and other areas where a PC can't reach?

  8. #8
    Senior Member DLB's Avatar
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    Re: Best Practice - Avoid buffing on top of body lines and edges

    Quote Originally Posted by Omar the Terror View Post
    Maybe I'm a bit late to the party, but how do you guys buff body lines and odd panel contours? I tried polishing a friends Nissan Hardbody pickup with my PC, but it has a sunken channel right through the waistline that I couldn't get even w/ a 4" pad. Any tips for dealing with this and other areas where a PC can't reach?
    I usually always go back around a vehicle with my product and an applicator of choice and hit the spots by hand that I couldn't get by machine.
    There's just some things that the machine can't do for you.

    DLB

  9. #9

    Re: Best Practice - Avoid buffing on top of body lines and edges

    So you can make those hard-to-reach spots match the machine-polished portions of the car, or does it sometimes leave an obvious difference between the machine and hand-polished areas? Also, what applicator do you recommend for this? I have some LC CCS hand pads on the way but if there's something better, I'd love to try it out. Thanks!

  10. #10
    Director of Training Mike Phillips's Avatar
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    Re: Best Practice - Avoid buffing on top of body lines and edges

    Quote Originally Posted by Dalton Blevins View Post

    There's just some things that the machine can't do for you.

    DLB

    That's a good point and that's why it's important to know how to properly apply a hand-applied compound or paint cleaner.


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