I had beauty shop peroxide in mind, but i honestly wanna go after the explosive precursor permit and not have to go with half way measures. I can get up to 12% peroxide from a trustworthy vendor. Can't get nitric but i can easily get sodium nitrate.
I do hope you can get one. There may be a lot more to the permit than you think.
Is the area where you live designated for chemical buisinesses? if not, do you have a place in an industrial area?
Can you provide a risk assesment for the surrounding area and the gasses you will expell in an emergency situation like a fire ( even one next door, or natural forest fire)?
Do you have the proper storage facility with safety measures for the chemicals and waste?
Once authorities find out you're refining pm's, you will have to provide an administration proving the source of you gold, and where you sold it, how much you're going to have to pay on taxes, have a good waste disposal plan, etc. etc. it can be done, but may prove to be not so much fun as a hobby anymore.
There are laws preventing trade in bouillon to keep criminals down, hence the move to digital money all around the world.
Once you've applied for a permit and it get's denied, prepare to be visited to check on your activities.