Coating process

A process for coating a solid object with a polymeric material, which process comprises flame spraying a polymeric material provided as a powder having a particulate size from about 20 mesh to about 200 mesh, the polymeric material comprising a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, which linear alternating polymer has a limiting viscosity number from about 0.5 dl/g to about 10 dl/g as measured in m-cresol at 60.degree. C., optionally uniformly mixed with up to about 35% by weight based on the total of a copolymer of ethylene and an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, by heating the polymeric material powder to substantially melt the polymeric material and thereafter propelling the substantially molten polymeric material onto the surface of the solid object to provide a first coating, thermally degrading at least the surface of the first coating and subsequently propelling additional substantially molten polymeric material onto the object to provide a second coating.