Potential/latent abilities

[Syklo]

Is there anyway to tell if a weapon even has a potential available to unlock?

I'm getting really pissed at all the +10's I DO manage to make, have no potentials.

Also, is there a list of known weapons with known potentials?

[Z-0]

http://pso2.swiki.jp/index.php?%E6%BD%9C%E5%9C%A8%E8%83%BD%E5%8A%9B

[Syklo]

Thanks!
Sucks that the weapons I want lack potentials :|