Things like salicylic acid and benzoyl peroxide could be a great way to spot treat your acne blemishes. Here are three inexpensive options at Walmart right now. 1. @cetaphilus Triple Action Acne Serum This is a salicylic acid based serum 2. @neutrogena Stubborn Acne am Treatment is a 2.5% micronized benzoyl peroxide treatment 3. @cerave Acne Control Gel. This is also a great salicylic acid based treatment.