Reducer: Always thin 4 parts Poly-Tone to 1 part reducer. Use either R 65-75 or RR 8500, depending on temperature. Don’t use MEK. Do not use any substitute reducers. There are none.
Poly-Tone ia a durable one-part, air-drying flexible coating available in 50 popular aircraft colors. Poly-Tone is manufactured from the same generic class of petrochemical feed stock as Poly-Tak, Poly-Brush, and Poly-Spray, and is considered to be our “standard” pigmented finish for the Poly-Fiber covering process. The thermo-expansion and elasticity are the same as all sub-coats, and there is no intercoat adhesion problem if the surface is clean. Poly-Tone is nonshrinking, non-bleeding, fire-retardant, chemical-resistant, and is used on both metal and fabric. It air dries to a satin gloss finish and can be polished to a high luster equal in appearance to any cellulose dope, lacquer, or synthetic enamel finish.