I've only been using straights for a few months now, but IMHO pastes are overrated. I give my str8 25-50 (very light) laps on my Chinese 12k and then 100 laps on newsprint. Newspaper, to me, works much better in place of pastes/sprays. It's easily available and cheap! Smooths out my razor so its edge is smooth as butter. YMMV, but it has worked wonderfully for me.
:euro: [COLOR=#0000ff][SIZE=3][FONT=comic sans ms]If you must do something, you might as well do it with a little class.......[/FONT][/SIZE][/COLOR]