Should someone add water, baby oil or olive oil (or whatever) to make hand LOTION more liquidity BEFORE SHABBOS for SHABBOS USAGE? Would this make it more LICHATCHILA for usage on SHABBOS?
Yes, if water was added to the lotion etc. before shabbos and now it is thin, it will permit its use on shabbos. In fact this is the solution that some of the poskim give to permit using liquid soap on shabbos.