3D printing polymer materials and similar is already well integrated for variety of industrial and functional purposes. Some of the reasons for this is freedom to design as desired, new functionality and manufacturing on demand among others are valued factors. The material group also holds some advantages such as relatively low cost and easy processing compared to other materials. The major disadvantages relate to limited material properties, which in general will confine a broad usage if a specific application exceeds the property limitation. However, the obvious benefits of polymer printing can possibly be achieved by including thermal spray as a post processing to enhance the functionality when exceeding the typical stability zones of polymers. The turning point of this paper is showing the potential solution of improving a nylon-based 3D printed brake manifold for a racecar. During a race the manifold will experience temperatures significant above the melting point. Thermal spraying techniques are put into use combining materials and properties to accommodate best possible outcome of a race. Excellent bonding between the different material groups have been achieved, which will be the focus of this paper. Nylon samples with thermal sprayed metallic coatings are examined using metallographic preparation, different (Light, x-ray, and electron) microscopical methods, and mechanical test to obtain a deeper understanding of the bonding mechanisms. The tentative results indicate a durable and sustainable solution that can be used not just in the very competitive racing car sport industry, but also in commercial products.