If you PM me with the SN, may be able to narrow it down for you a bit.
Regarding reblue- you MAY have a problem or 2.
1.) SN 500,000 to 1,200,00 (1909-1942): Receivers have a high nickle content and the bluing often "flakes" off, even when the rifle is in mint condition.
2.) SN 2,600,000 and above (Post '64): Receiver is an investment casting made from some unknown alloy which does not accept hot bluing by itself. They are plated with iron so that they can be blued.
WD 40 is great for displacing water- that is about it. Product called Kroil, made by Kano Labs is the best penetrating oil I have found. Pricey but works VERY well. Use coarse cloth, oil, rub rusty part that has soaked in oil for a day. Change to clean spot on cloth as cloth gets rusty. Repeat until arm falls off. Then change hands.
Having a smith inspect after you finish will cost less than the deductible for a trip to the ER.
You want to figure out if i'm close on mine being a 1945?I think thats what I read awhile ago based on my serial # but i'm not sure if the info was right.The serial # is - 1,350,5XX - Thanks