Just FYI: if you don't want the mess of chemical stripping at home, hereabouts there are commercial "blasters" than use softer less aggressive media than sand, such as walnut shells or plastic beads even glass beads would be gentler than "sand".
If your chrome plating is worth preserving they can wrap it with heavy protective tape before blasting, otherwise expect to lose that chrome.
But don't use anybody who you can't trust with a vintage bicycle frame!