Lifer

I had my M84 'repaired' by Parsons. Right now I'm dealing with ART II issues.
Parsons is VERY expensive. I was quoted 6 months turn around, and that became a year. 'Squirrel season'. That was the excuse every time. Ok.
$360 to clean it and fix an internal retainer ring and chase threads I buggered, and they didnt even replace $8 retainer ring. I would have sent them a new one i bought from Sarco. Never again.
There is a guy, Bill Biller, in PA who also does work. I sent him a Weaver 2.5 to rewire the crosshair. Told me 4 weeks. Well.. I tell you.. 9 months later, I just told him to mail the broken scope back to me. He was sick, getting chemo, but never told me that. Not sure how he is today. I fixed it myself with epoxy and crosshair wire I bought. Good as new. 20 damn minutes, it took me.
Ironsights just told me 12-14 months to fix my ART II.
12 - 14 months.. Yes.
Problem is, it's one man outfits. Mike Sexton is the only person on the planet who has parts and skill for the Vintage Leatherwoods. I pray he is healthy, happy and lucky. ;)
So.. That's your choices.
Someone is selling real m84 turret caps on EBay. If there is nothing wrong with the internals of your scope, I wouldn't even bother with Parsons. A couple of spots on the glass, leave it. It's dried sealant. It's just going to come back anyway. I already see new spots on mine. They ship it out for bluing anyway, but do take it apart and have the tube hot blued.
You can try cold bluing it yourself. I did a Lyman. Use the Brownells creme, and warm it up with a hair dryer.