I have a bay window that goes from the first floor all of the way to the roof. The wood framing around the windows is not very even. The previous home owner tried to repair one of the uneven spots but just made it worse. Any ideas how I could improve how it looks? I have attacehd a picture of the worse seam where a repair was attempted but there are a couple of other seams that don't line up.

Electric handheld planer?

 

You will need to remove and replace boards, while trying to do a better job than the last guy.

A planer would be a great way to find all the nails and chip your blade up.

 

If you don't want to remove the boards and start over you could use a belt sander to even it up some.
IMO the filler they added is the worst looking part.

 

Most likely the wood is rotting , that's why they tried to patch it up.
I'd want to remove it all and start over with PVC boards.

 

As mentioned, I am probably going to replace everything with PC boards.
Before I start moving forward, I was wondering if repalcing the trim with white light eight stone panels would work. trying to thin how I would trim things off at the 135 deg angles? I am sure it isn't too difficult. Just trying to visualize the parts of the project so I know what I would be getting myself into.

 

We have no idea what "white light eight stone panels" even are, so it's hard to say what you are imagining.

 

Sometime autocorrect works sometimes it doesn't.

I meant to type "light weight stone veneer".
Something like

 

Here is a picture of the front of the home. I was trying to come up with something nicer than the wood which, as you see in the other pictures has some problems.

 

I finally got around to working on this project. One of the suggestions was to use a belt sander to even up the butt joints. That worked better than I expected so I can even up the boards at the butt joint. The question now is how should I fill the joint so I can sand it flat without the joint cracking at sometime in the future. I don't think plastic wood with be strong enough long term. Epoxy? Exterior chalk?

 

I tried using filler but it ended up cracking. I dug it out and used caulk. THat seemed to work well. Should have thought of that first.

I have anyothe question though.If you look at the rectangular panels between the first and second floor window the middle panels use plywood sheet as a backer and the outer panels use masonite as a backer.

The plywood is still solid but the wood grain shows through and it is kind of ugly.
THe masonite panels have seen alittle water so the paint has started to peel and the masonite itself is degrading quickly.

I am considering replacing the panels but what should I use as backers. I don't want to use masonite. but would prefer to not use a sheet of plywood (because of grain showing through.

What would be a good choice? counter top laminate?

 

MDO. Stands for medium density overlay. It's like plywood with a nice smooth synthetic finish.