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T206CollectorNot just a pencil eraser, but an art eraser. And then very very carefully erase the pencil marks on both sides. If you do a good enough job, it'll rise above an SGC 10. But since some aspect of the writing or erasing will likely still be visible, you'll never get above a 40, and a 20 or 30 are more likely. But if you submit as is, I'd agree you're looking at a flat 10.