Some back yard master minds don't know all the laws thats goes ago with that kind, how much,feet and miles that some chemicals call for,Plus so much coverage which is alot.
I no longer fool with the raws chemicals in my back yard,the worry that went along with it is not worth it to me.The only way I'd mix any chemical would be at a commercial place and not in dangering the home owners around me.Some chemicals as to the one I played with had deadly fumes,which if a 55 gal spill the fumes could kill for miles,depended on the wind.
I have a good Alumium brightner and degreaser fomular,atleast I think so.The only way I got it was playing mix and match,I can count myself lucky for not getting blown up or badly burned.
I'm glad I buy mine now already made,the cost is more but I can live with it.Do they make a lock a child cann't open,the kids next door may already know how.I live out in the country but close enuff to town the law reads tell everybody within 5 miles of ya if you had so and so chemical.Would you like living next door to a master mind or one even a few blocks over.