I'm not really aware of any salicylic acid "treatments."
From the research that I've done, SA is best applied in a moisturizer in combination with 2.5% BP and left on overnight.
I would personally recommend the neutrogena oil free acne stress control 3 in 1 hydrating acne cream treatment. I use it in combination with the acne.org regimen. Every other night I alternative between SA and glycolic acid (AHA) and have been getting great results in terms of fading old scars/red marks.