Glass frosting help requested,

Dear Members,

I have a glass(borosilicate) item and trying to make its surface texture like sand blasting, But unfortunately I cant do sandblasting as part is too fragile.

I am trying chemical frosting with hydrofluoric acid to achieve desired surface texture, but not getting any frosting effect, can anyone suggest what may be wrong with my process? or what else I can try?

Many thanks in advance.

I am a regular member from India but not signing in due to competitive reasons.