Idealform acrylic bath fitting instructions I have says :"Warning Do not fix hand grips in any oil based bedding compound or putty .These materials contain solvents which will damage the hand grips irreparably" the hand grips are metal anyway which are with the halo bath and I was not thinking of using putty on hand grip assembly but are they talking rubbish. I thought putty was OK to use on any plumbing installations ?