5. Conclusion

Simultaneous spray technology is well established worldwide for the manufacture of all types of glass/polyester composite parts. Its main advantages are rapid implementation by unskilled workers and minimal initial investment. On the other hand, developments in other manufacturing techniques in response to an increasingly demanding working environment, notably in Europe and the United States, are limiting the outlets for manual simultaneous spraying almost everywhere, and it is more than likely that in the long term its use will be reserved for a few specific fabrications (molds, prototype parts, small series of parts (or single part) in small workshops) or for repairs.

Robotisation could encourage the development of the technique, or maintain it, in a certain number of applications concerning either technical parts or medium-sized production runs, but for the moment...