Hi,
I make climbing holds for a hobby/ hopefully one day as a business. So far I have been using Xencast P6 polyurethane. This has yielded an excellent texture reproduction (deeply important) and also very good strength. However, a massive issue I've had is that the textured finish is polishing up very quickly. These holds are intended to last years and multiple sets, however after just one two month stint on the wall under light use, the areas that have had any traffic at all have polished off completely which has meant this is completely unsuitable for its intended purpose. 

Is there another product I should try?  Perhaps a different method/additive to the mix? 

Thanks for your time and I look forward to any advice I can get.