How to repair threads on Spa Jet Escutcheon rings

[DR'sPool]

I have a gunite spa in the corner of my pool. For winterization the former ower's pool service company would remove the jets and also the escutcheon rings. Because of the removal and then the replacement some of the fittings in the wall are now cross threaded. I have new replacement rings but the don't want to clean up the cross threads. The rings measure 2 1/2" and I think the pitch is about 11 or 11.5 TPI. I am thinking of getting a large thread tap but am unsure the exact thread pitch. I think it is a 2 1/2" x 11 or 11.5 TPI.
My question are:
Does anyone know how to repair these?
WHat is the correct pitch?
Where could I get a tap for this?
Do I really need to remove the escutcheon ring for winterization. I would still remove the jets. The spa is complely drained each winter but it can get some snow and ice in it. What is the best practice?

 

[ajw22]

I don’t know why the escutcheon ring needs to be removed for the winter other then if it interferes with winterization plugs used in the jets.

Show us pictures of that area so we can better understand the situation.

Maybe @1poolman1 has ideas how to fix the cross threads.

 

[DR'sPool]

You might be right about them interfering. I have always removed because the former owner did. Can't get any picks right now pool is still frozen and we got 4" of snow last night. Any ideas on how to clean up the threads?