I just thought it might be wise to use intercoat after spotting in my white bass just so the metallic/Pearl is going over an even coat. Instead of a mixture of fresh sprayed, spotted in base coat and scuffed clear.I've always just applied the pearl directly over the base, making sure the base
is flashed off real good first. I don't know why you would need intercoat
over or under a base, especially a solid color like white.
My take.......If you didn't sand it properly.....meaning used too coarse of a grit or didn't get out all of previous grit scratches. For example final wet with 600 but not enough to get out the 320 dry scratches where you sanded the primer over the repair area. Then it is useful. But if you prepped it right not necessary.Do you mean the intercoat can really help as a first coat?
As Chris mentioned above, most of the time bumper covers are refinished complete for a couple reasons. First they normally have more damage than any panel on the car. Second, sanding them enough for good adhesion usually results in sand throughs on any edges. Bumpers usually don't match well anyway, so blending to keep color away from the edges where the hood and fender meet the cover is a waste of time unless your color is farther off than the factory match was. I have blended covers many times to keep the color away from edges, only to say to myself "why did you even bother?" after putting the cover back on and it still didn't match.