Is there a way to get prefect, seamless joints between two PLA parts?

I have heard of PLA welding, but it doesn’t quite look perfect. I want to make cosplay props and other decorations/utilities, but I hate that every time I finish something with multiple parts, you can so clearly see the seams! If not perfect, is there at least a way to make the much more difficult for someone with an untrained eye to see? Thank you!