If you mean the brasslite cover that slips over the steel receiver on my son's Golden Boy, sure, why not? Makes it look real purty.
But, that's off topic, so we probably shouldn't go there.
Edit: Sorry, my son saw this and corrected me. No Brasso on the receiver cover or butt plate. He says Henry recommends no solvents, just a clean, dry rag. He wipes his down with a silicone cloth.