They look good. Was there any mention on the package as to what the contents were? I had also wanted to Nitre some screws and a trigger guard. The screws were easy, the trigger guard I did not spend enough time polishing and it came out dull which it what I expected.
I used a product sold in Lowe's, it is a stump remover. I forget the exact ingredients, but the temperature is like yours. It is opaque and then turns clear. Never get any water near it and I used elbow length gloves, glasses with a face shield.
