UCHIDA-Marvey Uchida Wood Stain Marker. The Wood Stain Marker is perfect for touch-up and staining. Enhance the look of your wood projects and instantly touch up wood scratches. This package contains one Wood Stain Marker. Permanent; non-toxic; lead-free; and conforms to ASTM D4236. Available in a variety of colors: each sold separately. Imported.