I think I could put input on this ! Over here most people only speed dip their water traps because they retain such a bad scent from the gas (y'all call gasoline petrol right ?) one of the most common and favorite methods if treating traps over here is waxing and dying. Most of the time traps are boils for a few hours in Longwood dye and water. The dye turns acidic I guess (I'm sorry I don't completely understand the entire molecular process So forgive me ) and dyes the metal black or reddish Brown depending on the dye. Then you wax the traps whichever is where you have a separate pot with mel