question about 4" pads with PC for correcting

loco · 07-27-09, 11:09

Hi guys,

I've read that many of you feel it's much easier to correct swirls on paint using 4" pads with a PC. I will need to buy some pads and a different backing plate to do this. I'm wondering if you use a more abrasive polish/pad for correcting, then use a finishing polish, do you need to use a 4" pad for the finishing polish as well or can you go back to the 5.5 or 6" pads?

Are there any warnings, anything different you need to do with the PC when using the 4" as opposed to the larger pads?

Just want to make sure I order all the stuff I need and know what I'm doing. Thanks!

Less · 07-27-09, 11:20

Well, obviously you'll need a smaller backing plate. The only other thing I would mention here is that the PC is much more difficult to balance with 4" pads. What I mean is, with a narrower pad, you need to be extra careful when applying pressure to the machine as its spinning.

It's difficult to explain in text, but you'll know exactly what I'm talking about once you start polishing. It will feel like the pad might slip out from underneath the machine if you put too much pressure on it, or don't push directly downward on the pad.

Autogeek sells a 4" pad kit that comes with everything you need for about $50. I got it and I'm very happy with it. Though I will mention that I only use 4" pads for really tight areas or particularly marred spots. I wouldn't do a whole panel with it, let alone the whole car. If I felt something like that was necessary, I would either 1) use a stronger polisher (Flex or rotary), 2) Do two polishing passes with a 5.5" pad, or 3) just live with the problem.

Accumulator · 07-27-09, 11:24

I use the smaller pads for the follow-ups, basically I use them for any correction via PC. But I suppose YMMV as others seem very happy with the 5.5" pads

I like speed 4.5-5 for the 4" pads instead of 6, which sorta surprised me as I'm usually all in favor of higher speeds.

Other people seem to have a fair number of issues with the backing plates and pads, but I never have.

loco · 07-27-09, 12:02

Thank you both for the feedback and advice! And I appreciate the warning about balancing the PC. I never thought of that!

9935annivgt · 07-30-09, 07:33

If you switch to the edge system and cyclo pads then you do not have to worry as much about the balencing issue. I use the edge 4 inch pads and are very satisfied.

craigdt · 07-30-09, 08:14

The edge system is a great way to ensure proper centering. If you take your time, you shouldnt have an issue with proper pad centering with 4" pads, but you may find the Edge system easier.

Quote:

Originally Posted by Accumulator

But I suppose YMMV have...

Acc, you use this "YMMV" in about every post nowadays. What in the world does it mean?

Your method may vary?
Yo momma may vanish?

Legacy99 · 07-30-09, 08:19

Do not get the LC 3.5" backing plate. Broke 2, put a small ding in my headlight.

Dsoto87 · 07-30-09, 09:07

ymmv=Your mileage may vary

rlarsen462 · 07-30-09, 09:07

Quote:

Originally Posted by Legacy99

Do not get the LC 3.5" backing plate. Broke 2, put a small ding in my headlight.

What about this one:

Buff & Shine 3.5" Velcro Backing Plate

I ordered it but have not received it yet.

rlarsen462 · 07-30-09, 09:09

Quote:

Originally Posted by Dsoto87

ymmv=Your mileage may vary

Actually I liked "yo momma may vanish" a lot better.

Legacy99 · 07-30-09, 09:15

Quote:

Originally Posted by rlarsen462

What about this one:

Buff & Shine 3.5" Velcro Backing Plate

I ordered it but have not received it yet.

Looks smiliar to the LC bp, 3 rivets.

rlarsen462 · 07-30-09, 09:24

Quote:

Originally Posted by Legacy99

Looks smiliar to the LC bp, 3 rivets.

Great. So assuming it's garbage, what should I be using? I haven't see one other than that one and the LC one.