The only way to know if H. Peroxide works is if it is used on seeds already afflicted with early stages of rot or mildew.
I have tried it many times on just such daylily seeds and they continued to rot. Mildew I have never had.
Most perennial seeds or seed coat have a coating of seed germination inhibitor. It is natures way of preventing germination until conditions are right for their survival. The seeds are in a dormant stage at this point. Without the inhibitor factor, seeds would try to sprout in the winter when they can't survive.
I soak daylily (DL) seeds in hand hot water overnight to plump up the seeds. They then go into moist kitchen towel and place in a plastic bag and stored in the fridge for 3 weeks. They will begin to sprout in room temp within 7 to 14 days. I will add that the time it takes for a DL seed to sprout depends on the type or variety of DL. It is a genetic factor. It is possible that true evergreen DL doen't need 3 weeks of stratification at all. I don't grow evergreens, just dormants and semi-evergreens.
The photo is of DL seeds just before they got planted in soil.
Note: The photo is mine. It has my Ebay seller name on the copyright.
