water base finishes: ebony

[gutlo]

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    List,

One thing to bear in mind when considering waterbase finishes:  does the =
manufactuer recommend spraying clear over a black stain or undercoat to =
achieve "piano black"?

If so, bear in mind that you could run into problems, having to do with =
appearance and repairability.  Many wb's look somewhat milky or cloudy =
when dry.  This is not easily seen over mahogany or walnut, but can =
become obvious over black.  A clearcoat over black is much more =
difficult to touch up than a solid black coating.  It may be sometimes =
necessary to re-spray an entire section to get a good blend on a touch =
up.

Some black wb's (and nitro lacquers, too) go grey when they're rubbed.  =
This is a problem with polyester.  It goes slate grey when rubbed with =
4/0 steel wool or any abrasive rougher than high polish.

The most difficult challenge in formulating PianoLac was creating a =
black that made a lustrous satin and a high polish without going grey or =
looking like plastic. =20

Arthur Grudko
StarHawk Labs


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