Siraya Blu Clear v2 is the best I have found when it comes to strength and affordability. It isn't the most attractive, it's ends up a yellowed matte clear color, but for internal parts it should be fine. Or can be painted. I have had some success tinting it using Tenax universal colorants but I have only tried adding enough color to tint, not to make it opaque. If you tint it you can't pour the remaining resin back in the container so I just have a liter that I have tinted to preference so that I can pour remaining tinted resin back into a container. You might want to also look into Siraya Tenacious. It cures slightly flexible if you use it by itself but you can add it to the Blu with good results. My mix is 90% Blu, 10% Tenacious then tinted with Tenax black for a smoky-clear result.