nylon brushes will not get carbon out of a barrel,and I have tried sweets on good barrels over night with no problem, if your scared too,> use G.M. parts cleaner but to get carbon out that barrel you will need a bronze brush and solvent. I have poured sweets in a glass bowl and set pieces of steel in the bowl for 24 hrs. and nothing happened, that must be a old wise tail
>> per James Sweet > it does say on my sweet`s bottle: harmless to steel
Last edited by pete53; 03/20/18.
