Coincidentally, I started a thread with a similar question last night

http://www.xmarksthescot.com/forum/s...ad.php?t=28085

The 2nd Post in this thread will answer some of your questions
http://www.xmarksthescot.com/forum/s...mparison+chart


This thread goes into great detail
http://www.xmarksthescot.com/forum/s...arison+acrylic