How do I cover the outside of my bath tub?

My tub is old and ugly I want to use stone tile to cover the outside with stone look tile.. Problem is the surface of the tub wall is not smooth, but it it has a 1/2 in indentation it was was suppose suppose to be decorative I suppose.. The stone I want to use is narrow strips 3, 2,1inch long and 3/4 inch high.. Any ideas would be appreciated.. Thank you..

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