user36: In this question about removing scratches on clear part, all the answers are guesses and untried concepts. 
I could start flagging all of them as non-constructive or should somebody clean this up and mention that guesses are not a good answer?

user56: I've protected it and added the standard "We're looking for long answers that provide some explanation and context. Don't just give a one-line answer" message.
There were some potentially useful (if untried) suggestions, which I've moved into the comments.
Cheers.
Edit to add:
That said, a little googling suggests that the last answer should be a good bet: Novus does appear to be a good fit for polycarbonate plastic - which is what the transparent bricks are made from...

36: <p>In this <a href="https://bricks.stackexchange.com/questions/1595/how-to-remove-scratches-from-lego-windshield-parts">question</a> about removing scratches on clear part, all the answers are guesses and untried concepts. </p>

<p>I could start flagging all of them as non-constructive or should somebody clean this up and mention that guesses are not a good answer?</p>
 56: <p>I've protected it and added the standard "We're looking for long answers that provide some explanation and context. Don't just give a one-line answer" message.</p>

<p>There were some potentially useful (if untried) suggestions, which I've moved into the comments.</p>

<p>Cheers.</p>

<p>Edit to add:</p>

<p>That said, a little googling suggests that the last answer should be a good bet: Novus does appear to be a good fit for polycarbonate plastic - which is what the transparent bricks are made from...</p>
