Washing was probably quickly regretted. Cold painted pieces, particularly some of the heavier pieces attributed to H. Northwood had the edges done with fired gold design. These intaglio pieces had fruit as their most common motif. Certainly Intaglio is a major chapter of any book to be conceived documenting the Goofus phenomena. Finding an old piece with most all of its original paint is rare.
Many pieces showing up today have only a slight bit of their paint remaining.
Many have none. Unfortunately, the desire to enhance pieces for resale has resulted in many a sloppy attempt at re-touching or total repainting. This practice is to be abhorred. Interestingly, old pieces which have been stripped of all paint and allowed to sit in the bright sunlight have frequently taken on a pale amethyst hue due to traces of manganese use to make the glass itself. Paint as you like, but, to be an honest person you must forever label such pieces as such and never offered for sale as possessing their original paint.