Get your GF to scrub it hard w/ Oxy soap bar and wash cloth in the shower.
A skilled pimple poper w/ sharp claws helps to
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Arnolds swim and Tan, yes; SOme Natural Sun if possible also.
Retin-A on spots (Mex mail order Pharmas) (Stay out of the sun w/ the creme on).
Are you soaking wet w/ sweat doing Bench Press, grinding it in??? Try to stay dry and clean benching, if you are overheating, dress down or no shirt benchs.