Flat paints may be washed with care, but excessive rubbing may cause shiny spots on even the best quality paint. For best results you should wash the whole area rather than the affected spot. Washing should not be attempted until at least one week after application. Full gloss and semi-gloss or low sheen finishes are completely washable and may be scrubbed frequently. 100% acrylic paints can be cleaned with household cleaners. Vinyl and cheaper plastic paints cannot, as they are broken down by the solvents.