Old, expired plastic credit cards have numerous uses as a tool for oil painting (be sure to deface the information on the card!). Some of which are:
- To get straight edges.
- Creating painting "knives" which may be bent and/or cut with a scissors or knife to any contour.
- Ditto for sgraffito.
- Scraping paint off a canvas.
- Cleaning the palette.
- Bent at a right angle to lean a wet brush on.
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