Welcome aboard Barry! You've picked the best guitar forum on the net to join. Although I couldn't really tell what you're question was as to the stevie and jimi sound, I think what you're describing is an upwards rake, which you do by muting the strings with your left hand and running along the strings from top to bottom (high e, b, g, d, a, low e). Sorry if I couldn't help with the description, but I'm sure one of the hosts here will be able to write out some examples with tab if they have time. Good luck with your playing bro.

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BadHorsie, holdin' it down like Gravity!