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Reduction of bright dip solution for aluminum

2005

I have started an aluminum extrusion anodizing plant.i am using a bright dip solution made of 86%phosphoric acid and concentrated nitric acid for the polishing of extrusions. I will take the extrusions when desired silver color is obtained.but the solution is very viscous and it sticks to the extrusions heavily.so the solution is getting reduced so that the process get uneconomical. So please tell me a solution for the problem and advise how the bright dip solution can be maintain to its optimum. Can we add water to the solution?if so how much we can add?

Thanking you,

Yours faithfully,

LINSON CHUNGATH
ANODISING INDUSTRY - OLLUR, KERALA, INDIA