[semlar]

Don't quote me on this, but you might try something like this..

for i = 1, 6 do
    local cooldown = _G['RuneButtonIndividual' .. i .. 'Cooldown']
    cooldown:SetSwipeTexture('', 0, 0, 0, RHaoc)
    local start, duration, runeReady = GetRuneCooldown(i)
    if not runeReady and start then
        CooldownFrame_SetTimer(cooldown, start, duration, 1)
    end
end

I don't think it will update the texture unless you call SetCooldown on it afterward, but there might be a better way to do this.