Well I guess if your considering rolling on paint... I'm pretty sure the house paint sprayers aren't meant for the thinner reduced automotive paints. The one time I used one it oversprayed most of the yard, with thinned paint I imagine it would have worked more like a fog machine. Instructions for the one you posted included adding lubricant to the nozzle which I would think would lead to wicked orange peel or fish eye in the paint. If you are aren't up for buying a compressor at least consider this option before grabbing the paint roller. HF all in one HVLP sprayer.