Honeylocust ,Gleditsia triancanthos, gets it's name from the sweetness of the seed pods. They are sweet, but not tasty. These trees, if they are not the thornless variety have huge, three pronged thorns. If you start them from seed, they will have thorns since all the thornless varieties are grafted. Seedless types are the ones usually planted as ornamentals, but they do not bloom much.
Black Locust, Robinia pseudoacacia, also has thorns, but smaller. I've heard that these are
hardy to zone 3, but the few that I've found in my zone 4 area often have have the flower buds frozen during late frosts. No flower buds, no nectar.
The easiest way to scarify seed is to scratch it with a file. I have a three cornered file that makes a quick easy cut. It only requires one nick in the seed coat to allow in water. You can nick a lot of seeds in twenty minutes. Some people scratch it well with sandpaper. Of courst this requires plants that have reasonably large seeds, but both of these trees do.
Using acid can be pretty tricky. The acid has to burn away most of the seed coat without going too deep.