Styling Advice for Chinese Elm

[Posty]

Hi, I got this tree from a big box store to practice keeping alive. I want to use it to learn branch structure while all my other cuttings grow out.
I have two main questions with this tree: removing branches and healing chops.

I understand branches should only ever split from 1->2, so would it be correct to remove any extra branches coming out of joints (examples highlighted in red)?

What options do I have for cleaning up the trunk chop wound (circled in blue)? I was thinking dremel and cut paste?

I think the tree is overgrown and should be cut back in late winter, but I am apprehensive to remove the thicker branches as I don't fully understand styling yet.

Appreciate any advice

 

[River's Edge]

I would start with a different question. What direction would you like to take for developing the trunk line and design? In order to answer that question I would explore the nebari and check the angles and options available!
The reason for this is when the tree is repotted and eventually placed in a Bonsai pot the desired front, trunk line and development potential may be ruined by previous decisions made without considering the above first.
Step one might be to carefully repot and explore the nebari and trunk line this spring! if a clear plan develops at that point it may also be a good time to reduce branching, further develop the trunk line.

 

[Posty]

Thanks @River's Edge ! That makes a lot of sense. I'm building a larger wooden box to move it into in spring so I'll do root and branch work at the same time. I would like the final tree to be taller so I may try to redefine a leader I suppose and let it grow out a few seasons.

 

[River's Edge]

Consider shortening the trunk to adjust the current s curve if possible by selecting a lower branch for continuation of the trunk line. This is suggested to accomplish a more natural movement for the species over time. Just a thought!