id try sticking some proper white in there, feint heart never fucked a pig!
edit: be sparing with it though! one pixel in the right places, where the highlight would be brightest. and think about the scale, yes there may be a white highlight in some places if this was a real-life slimy killing machine, but it might be so small that a pixel is too large to represent it here, and you can use a dimmer colour instead to suggest the blending.