EVERETT, Mass. - Dampney Company Inc., Everett, Mass., manufacturer of specialty paints and high-temperature coatings since 1917, has purchased the assets of Alvin Products, Inc., Lawrence, Mass., manufacturer of lab-metal repair and patching compounds since 1950. The joining of the two Massachusetts manufacturers will expand Dampney's reach, bringing innovative industrial repair products, specialty paints and high-temperature protective coatings to new markets worldwide.