How exactly do you know you've "scuffed" enough?

J

jtfx6552

Member
And what do you do with "inside" corners? 600 paper most places? All places?

I need to scuff the cowl on a 65 Mustang, lots of little detail around each vent hole. Do I use paper? Or an "extra" or "ultra" fine scotch brite? Do I need to make sure every spot of gloss is gone?
 
I would use a red scotch pad and make sure all gloss is gone. I would use a grey pad if it is a blend area.
 
You do want all the gloss gone. You can use a scuff paste on a qtip to get really tough spots. But, you gotta be sure to get that cleaned off.
 
Water and wet sanding will let you know when you have scuffed enough, water will break where it is not scuffed enough, stay wet and sheet when it is.
 
Gray scuff pads and Scuff Stuff is probably what we would use for a final exterior finish in a difficult area, since red pads can leave a bit too coarse of a scratch (they are somewhere around 400 grit). Gray pads are somewhere around 800.
 
The thin pads made by 3m, Norton and mirka are not as coarse as the normal pads. They don't have the random chunks of material that produce nasty scratches that the normal pads do. They are much easier to get in to corners and tight areas and produce a much nicer finish.

The wet method works well. I also like to spray over reduced urethane base on whatever I'm sanding to visually see what I've missed.
 
keith_y;n80635 said:
The thin pads made by 3m, Norton and mirka are not as coarse as the normal pads. They don't have the random chunks of material that produce nasty scratches that the normal pads do. They are much easier to get in to corners and tight areas and produce a much nicer finish.

The wet method works well. I also like to spray over reduced urethane base on whatever I'm sanding to visually see what I've missed.
Click to expand...

The thin pads do seem to be a little less course, they also don't seem to last as long but is another good option.
 
I use a pencil with an eraser to push those scuffy pads into tight corners. Boss still wants it scuffed better, though. I have used those pens, they are fiberglass strands, right?
 
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