If it is %100 percent sulfamic acid and it has no additives then why not, it should be easy obtain from hardware stores. I buy sulfamic acid from chemical supplier, it costs around $6,7 per kilogram. I searched online and found some online hardware stores that sell 1lbs (454 grams) packs around the same price. It can make a solution of 4.5 liters and it can neutralize approximately 60 full sheets 22"x30"(56x76cm). It is still cheap I guess.