What is scratch art called?

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Tags

1. #australia
2. #britain
3. #scratches
4. #scraperboard
5. #called
6. #direct
7. #north
8. #white
9. #sometimes
10. #usually
11. #colored
12. #especially
13. #artist
14. #america
15. #great
16. #where
17. #layer
18. #engraving
19. #beneath
20. #referred
21. #scratchboard
22. #reveal