Yes you can spray paint those thrift store brass lamps!

Mid Century Eclectic Decor from the Thrift Store

Thrifted this lily lamp for $10 that someone had painted. Restored to brass in a few hours. : r/ThriftStoreHauls

Took a shelf from an entertainment center and put a picture frame

DIY: SPRAY PAINTING BRASS LAMPS - Stagg Design

Thrift Store Lamp Makeover

Brass lamp makeover with spray paint, Thrifty Decor Chick

painting a lamp OFF 79%

European Paint Finishes Paint finishes, High gloss white lacquer

Easy Thrift Store Projects to Upcycle for Home Decor - Reinvented Delaware