This is the way we used to do it for beer campaigns and the like to get the beading on the glass to make it look cold (will work for the hammer too). Gives you total control. Get some clear dulling spray (Google and you'll find it) and give the hammer a light spray. It dulls down the surface and gives a key for what comes next. Get a spray bottle - the ones sold in garden centres are good. Mix 1:1 water and glycerine (glycerol) in the spray bottle. Spray the hammer. The water will evaporate off leaving beads of glycerol that will stay there as long as you want. (Dulling spray cleans off with lighter fluid).