The only way to truly get rid of the seam would be to fill it from both sides with something that has the same refractive index as the plastic, and then polish it to blend in — but what would be a good filler for that, I have no idea 
There’s an idea for modelling supplies manufacturers reading his forum: please bring out a transparent filler like that …

There’s an idea for modelling supplies manufacturers reading his forum: please bring out a transparent filler like that …
Comment