Hi Jonblue. I take it that you are using Beutel formula page 88. I have never had the amount of surface copper plate as you describe though I have had the odd tiny patch now and again. This formula calls for 1.2 grams of Copper Sulphate, 3 grams Ferrous Sulphate, 3 grams Ferric Chloride and 5 grams of Alcohol all in 100cc or US pint water. Somehow I think you may have made an error in the quantity of copper sulphate in the mix so I do recommend that you re-make the formula. Also apply the formula very sparingly just enough to make the surface damp and try not to overlap passes if you can, I can not say much about the ambient temperature because it is always cool over here.
