with florid decoration

Please someone correct the sentence if necessary

It was all about a long room at the back of the house, once evidently a dining room, now with florid decoration of which most part looked oddly and out of keeping with the shabby and sparse furniture.

Thanks

It was all about a long room at the back of the house, once evidently a dining room, now with florid decoration, which for the most part, looked oddly out of keeping with the shabby and sparse furniture.

I think I would prefer, "now decorated in a florid fashion’ to ‘now with florid decoration’.

Now I don’t understand using the commas in “…florid decoration, which for the most part, looked oddly…”

Why not “…florid decoration which, for the most part, looked oddly…”

My second question relates to use of the definite article in front of “most part”.
Is it possible to say it without the the?

“…florid decoration which, for most part, looked oddly…”

Problem for me is that it isn’t possible to precisely define that part.
Is it possible to use the indefinite article in such case too?

“…florid decoration which, for a most part, looked oddly…”

Thanks

Sorry - mey error - you’re right about the commas.

You need the definite article.