I’ll keep it clean. The picture of paneling you included would have been sealed with either shellac, lacquer or varnish. Each of those finishes is best removed with a different solvent. So, you may need a little experimenting to see just what you have and what will work best.
We all know how effective alcohol can be at stripping 🙂 Shellac is most easily dissolved using alcohol. Get a quart or so from your home improvement store and see if denatureed alcohol strips the finish.
Lacquer is stripped with lacquer thinner or acetone. If this is what you use, be sure to have plenty of ventilation. Remove it using steel wool dipped in solvent.
Varnish and stain removing strippers are usually blends of xylene and methylene chloride. These are applied to dissolve the finish and removed with a scraper and/or steel wool.
Some citrus strippers may also work