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Substitute to ammonium bi fluoride

I am looking for a substitute for ammonium bi fluoride to get a satin matte finish in aluminum parts. Caustic doesn't give the same finish. Can you help me?

Ricardo brakarz
- Rio de Janeiro

PLEASE TRY DILUTE HYDRO FLUORIC ACID WITH A STABILIZER.

H. K. BAPU RAMESH
- MYSORE, INDIA

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