chip douglas
08-29-2003, 07:38 PM
I thought i`d share this with you, as i`m prolly not the only one to wonder about their abrasiveness scale, and most especially the machine glaze 05937, as it comes up often.....so here goes :
We do not measure compounds and glazes by grit size. While the mineral in
the various products are a specific size to the application, the liquid
they are suspended in also plays a large roll in how the finish will turn
out.
3M views paint repair this way; sand paper will have to be used to correct
the imperfections that a compound will not get out such as dust nibs, runs
and fish eyes. If scratches are too deep, a compound also may have
difficulty removing them (if you can feel a scratch with your fingernail,
it is probably right through the clear coat and will not be able to be
removed completely). With these defects, hand sanding wet with 1500, 2000
or 2500 and a firm block will do the trick. Machine sanding with P1500
will also work well, is faster and you can see your progress.
It is after the sanding step that we compound using either Perfect-It III
Rubbing Compound (PN 05733) or Extra Cut Rubbing Compound (PN 05736) and a
white foam or wool compounding pad to remove the sand scratches.
Obviously they finish a lot finer than the 1500, 2000 or 2500 sand paper to
achieve a gloss.
If swirl marks are present from the compound, the 05937 Machine Glaze is
used with a dark grey foam pad, like you said, in a 2 X 2 area with medium
pressure. To remove the swirl marks and leave a perfect finish would mean
that this product is for sure much finer than 2000 grit abrasive.
Adding a wax after this step depends on the clear coat. If it is not fully
cured, the wax may smother it and cause problems. It is best to check with
the paint company`s recommendations as to how long to wait prior to waxing.
The defects you describe in your e-mail may or may not be removed with
the 05737 alone. It was designed to remove swirl marks from the
compounding step. If the swirl marks are similar to that, then you should
not have a problem. To remove the scratches, you may have to sand and
compound as I described above.
I hope this helps you out. Please feel free to e-mail me back or call if
you have any further questions (800 265-1840 x2776)
Regards,
Bill Suzuki
Technical Service
3M CANADA COMPANY
We do not measure compounds and glazes by grit size. While the mineral in
the various products are a specific size to the application, the liquid
they are suspended in also plays a large roll in how the finish will turn
out.
3M views paint repair this way; sand paper will have to be used to correct
the imperfections that a compound will not get out such as dust nibs, runs
and fish eyes. If scratches are too deep, a compound also may have
difficulty removing them (if you can feel a scratch with your fingernail,
it is probably right through the clear coat and will not be able to be
removed completely). With these defects, hand sanding wet with 1500, 2000
or 2500 and a firm block will do the trick. Machine sanding with P1500
will also work well, is faster and you can see your progress.
It is after the sanding step that we compound using either Perfect-It III
Rubbing Compound (PN 05733) or Extra Cut Rubbing Compound (PN 05736) and a
white foam or wool compounding pad to remove the sand scratches.
Obviously they finish a lot finer than the 1500, 2000 or 2500 sand paper to
achieve a gloss.
If swirl marks are present from the compound, the 05937 Machine Glaze is
used with a dark grey foam pad, like you said, in a 2 X 2 area with medium
pressure. To remove the swirl marks and leave a perfect finish would mean
that this product is for sure much finer than 2000 grit abrasive.
Adding a wax after this step depends on the clear coat. If it is not fully
cured, the wax may smother it and cause problems. It is best to check with
the paint company`s recommendations as to how long to wait prior to waxing.
The defects you describe in your e-mail may or may not be removed with
the 05737 alone. It was designed to remove swirl marks from the
compounding step. If the swirl marks are similar to that, then you should
not have a problem. To remove the scratches, you may have to sand and
compound as I described above.
I hope this helps you out. Please feel free to e-mail me back or call if
you have any further questions (800 265-1840 x2776)
Regards,
Bill Suzuki
Technical Service
3M CANADA COMPANY