On Sat, 3 Oct 2015 07:31:55 -0700 (PDT), Tim
wrote:

This is a nice sumple old boat and I don't want to "restore" it but the plexiglass windshield is gaily yellowed. Anyone know
where to get a replacement. Probably be worth more than the boat. Lol!

===

Here's something that might work:

http://www.ehow.com/how_5877545_yellowed-plexiglas-clear-again.html

If that fails, you might try doing a small area with one of those kits
they sell for restoring plastic headlight covers. If all else fails,
a very fine polishing compound like 3M Finesse It might work.

More here;

http://www.howtocleanstuff.net/how-to-remove-yellow-discoloration-from-clear-plastic-headlights/