[all2fast]

This problem has been causing problems for about 4 weeks. The real problem is that my aluminum is cast and it is pourus. I have electro cleaned it, baked it, boiled it, and just about everything else. What I found is that it is not the copper that is causing the problems it is the zincate. Although I have tried it without zincate and that does not work neither. The last fair to good experiement I had was to degrease, rinse, pickle 3 for a few seconds only, rinse, then into the zincate for a quick dip NOTHING MORE and then let it start to drip dry and some crustations will form and I just did a quick dip in the pickle 3 once more followed by a good rinse and then straight to the copper bath. The only problems I am having right now is that I have plated this aluminum piece several times and I left the old copper on it. This should not be an issue but it is on this particular cast piece. At the interface between raw aluminum and the past copper I get minimal bubbles. Anyway if you hear of something or have complete success in the above let me know.