These are my own versions which I have been using for years and years, I started with MDF as a base, but then decided I would prefer Tufnol. However, the surface stays wet from the flux and has to be wiped down in use. I may well go back to using MDF when I need to replace the work surface. 2mm modeller, Tony Kennedy, laminated a layer of aluminium foil and then a proprietary heat proof film intended for ovens.