By reducing neutral recycling and providing a low-Z plasma-facing surface, lithium wall coatings have led to major performance improvements in TFTR1, CDX-U2, and NSTX3. The effects of lithium coatings on plasma performance are being studied in the Lithium Tokamak Experiment (LTX), a modest size (R=0.4 m, a=0.26 m) spherical tokamak. In LTX, lithium coatings can be applied to close-fitting stainless steel surfaces surrounding ∼90% of the plasma. The surfaces can be heated to ∼300°C, allowing plasma operations with partly or fully liquid lithium surfaces.