Maybe I'm answering my own question. Maybe someone here might benefit.
http://www.examiner.com/gardening-in-spokane/seed-starting-scarification
From the preceding link I found the following information.
By Laurie Brown
Spokane Gardening Examiner
Laurie has been a Bonner County Master Gardener and small nursery owner since 1996 and a gardener for much longer.
An easier method of scarification is hot water scarification. In this technique, which I use on a lot of seeds, you place the seeds in a cup and pour hot (170 to 200 degrees F) water over them, to a depth of about 5 times their diameter. Do NOT use boiling water, as that will kill the seed embryo. Allow the water to cool and let set over night. The seeds should be plump and on the bottom of the container. I use this method even on seeds that don’t absolutely need it these days, because it both speeds germination and raises the germination rate. Seeds that are still floating after 24 hours can be pulled out and retreated.
Seeds that benefit from a hot water soak:
Peas
Beans
Sweet Peas
Nasturtium
Morning Glory
Parsley
Cilantro
Most tree seeds, especially maples
Squash, melons and cucumbers
Some people are even doing this with pepper seeds to speed them up.
Acid scarification is a technique I have yet to try. It’s necessary for some rose seeds, as well as camellias and some tropicals and cacti. Since I’m not that keen on growing those particular plants, I’ve avoided playing with the concentrated sulfuric acid aka battery acid. For a long time I wondered how a plant would evolve that needed strong acids for its seeds to germinate, and then I discovered that they are seeds get eaten by animals or birds, which means they pass through the stomach with its concentrated acid! Once they are pooped out, they are ready to germinate-and even have bonus fertilizer.