How to make my cheap but well sanded wood look glossy
You are looking at the correct products but to get a high gloss several coats will be needed with a very light sanding or steel wool buff and clean in between coats. In high end finishes I put at least 5 coats and have used closer to 30 on show pieces. Light sanding between coats is important, don't over work or you will have bumps , put it on let dry buff clean put more on and repeat. You can make plywood look awesome with a light stain and several coats of polyurethane