What kind of glue makes the smallest mess with tight fits?

[evansd2]

Acrylic threads:

Acrylic gluing tricks: two flat surfaces?

I need to glue two pieces of acrylic together, flat surface to flat surface. The interface should be as clear as possible. So, naturally, I’ve got Weld-on 3 solvent adhesive. However, in my tests I get quite a lot of visible artifacts in the glue interface – not crazing, but rather ripples, and what appear to be tiny lines due to variations in solvent evaporation rate. …um, anyone got tips on gluing flat surfaces to each other in clear acrylic? Would something like Weld-on 16 help? I suspect t…

And this one by @GrooveStranger was great:

Comparison of adhesive appearances on transparent acrylic