Megs unigrit...

wannafbody · 05-24-07, 06:52

Accumulator sent me a couple sheets of Megs unigrit 3000 to play with. First of all this stuff feels almost grit less. I used some 3m 2000 grit with a water/NXT soap mixture. That allowed the 2000 grit to glide effortlessly over the paint. When I attempted to use the NXT soap with the unigrit 3000 I ended up with the paper sticking to the paint surface. The grit is so small that the 3000 couldn't cut thru the NXT soap. I switched to a bottle of plain water and this stuff worked very well. To run your hand over the paper it feels almost gritless. It lightly scuffs the paint surface. I think this paper would be a real timesaver on certain finishes vs using a heavy compound and wool pads on a rotary. If needing to do deeper correcting the 2000 would be a better choice. Finish with either the 2500 or 3000.

Accumulator · 05-24-07, 08:50

IMO you oughta get some of the coarser Unigrit stuff too. I really think it'd eliminate those pesky, random, extra-deep scratches that show up now and then with the 3M paper. I've used the 2000 grit Unigrit sanding block (or was it 2500

) on Audi clear and was able to bring it back fairly easily *by hand*.

Interesting about the NXT soap, I've only used Meg's #62 and Griot's, both well-diluted.

wannafbody · 05-25-07, 07:16

I'm kind of surprised that most body shops finish with 3m 2000 grit. To remove those sanding scratches they must be using some heavy compounds and wool pads. Unigrit definitely seems to be a better paper.

Coupe · 05-25-07, 07:25

I bought megs unigrit 2500 and 3000 and your right, they feel grit-less. I havent been able to try them out, having trouble getting scrap panels.

RAG · 05-25-07, 07:33

Couple thoughts...

I actually have not noticed a difference in the number of "rogue" deeper scratches with one paper versus another, but that's just me.

When you finish with 2000 (any paper), you definetly have your work cut out afterwards and gotta get nastly with the buffer; and forget what the compounds and polishes say regarding their ability to remove scratches, cause they lie...you need to find the strongest compound you can find with the nastiest wool pad and get crazy.

Setec Astronomy · 05-25-07, 08:54

When you gentlemen are talking about 3M 2000 grit, are you talking about the black silicon carbide paper? 3M does also make polishing papers with a more uniform grit size. They are rated in microns and have a clear, thicker backing. My brain isn't working right now so I can't think of the name, I'll check it later.

Accumulator · 05-25-07, 09:07

Setec- Yeah, we're talking about the black silicon carbide paper. I haven't tried the clear plastic film-backed stuff (at least not that I knew was from 3M, used some back when I was building models but I forget whose brand it was).

RAG- Interesting that you didn't experience the same differences in the papers. I was truly surprised when I was able to remove the Unigrit scratches by hand after having struggled with what the 3M left behind, but it was actually pretty easy (used 3M 05933/terry).

Heh heh, I'd better watch what I say to you about this lest I jinx myself- I never had clay marring until you and I discussed Sonus gray clay in a similar way

BTW I'm still using that batch you sent me, sure is aggressive but that's OK when I need it and I wouldn't have it on hand if not for our discussion about it.

Setec Astronomy · 05-25-07, 09:12

Quote:

Originally Posted by Accumulator

Setec- Yeah, we're talking about the black silicon carbide paper. I haven't tried the clear plastic film-backed stuff (at least not that I knew was from 3M, used some back when I was building models but I forget whose brand it was).

They make three different products in that micron-grit line, a paper with a thick, translucent backing, a film, which has a shiny plastic backing, and a cloth. I'll look it up and report back later.

Scottwax · 05-25-07, 11:58

Quote:

Originally Posted by wannafbody

I'm kind of surprised that most body shops finish with 3m 2000 grit. To remove those sanding scratches they must be using some heavy compounds and wool pads. Unigrit definitely seems to be a better paper.

Probably why the cars look so crappy after they buff them, eh?