<p>I changed some answers on my scoresheet and erased them as best as I can. They weren't completely erased, but were just faint marks.</p>
<p>In general, I'm just wondering how sensitive the SAT scanners are? Are they sensitive enough to pick out the darkened answer rather than the erased answer?</p>
<p>No. After the test, some of my marks smeared onto the other page. And it didn’t seem to throw my scores off. (You know, like when you fold the answer booklet in half so that some bubbles rub on the other page? haha)</p>
<p>Don’t worry. Happened to me for the ACT. It turned out fine (got a 34). The machine should see the darkest bubble as your answer so some light erasure marks are fine.</p>