Scruff (y)??? hehehe
There's three different types of proofing you can get for an M65.
a) Kiwi Camp Dry - available at grocery stores. It's silicon based, you paint it on the parka, it dries, voila! Waterproofness! In all actuality, Camp Dry is very similar to what the military recommends for clothing. (Silicone Textile Water Repellent, Aerosol. NATO stock number: blah blah blah)
b) Nikwax Cotton Proof: Available at most sporting/outdoor stores. This stuff comes in spray or wash-in format. I'd suggest wash in, it works better. FOLLOW THE DIRECTIONS. Turn your washing machine on with no soap or clothing in it, do a cycle. This removes all soap/bleach residue with destroys proofings. Do another cyle with the jacket and the recommended amount of Cotton Proof. Do a third cycle, a rinse cycle. Hang the jacket up somewhere, let it dry for a while. Voila! Waterproofness!
c) Grangers Cotton Proof: Available in good old Blimey, which means I can't bleedin' get it in Canada. Anyway, it's a flourocarbon based treatment, some chaps say it works better than Nikwax, others say Nikwax is better than Grangers.
Either way, any of these 3 treatments will work fine. You should do it once a year or so, depending on how much you use the M65. Also, dirt, sweat, and that sort of thing lowers the effectiveness of a proofing, which in technical terms is called a DWR. (Durable Water Repellency) The solution is to wash the jacket when it gets dirty, WITHOUT SOAP. Just toss it in the washing machine, wash, rinse, hang up to dry. Voila! Your DWR works great! Also, heat re-vives it. So, in a dryer on a medium setting will be as good for a DWR as Viagra is for oldsters.
I remember me good old Dad telling me that back in the day they would iron their Gore-Tex jackets when water stopped beading up. Another thing you can do if you're in the bush is to boil some water in your cooking pot so it's hot, and use the pot like an iron on your M65. Voila! Revival!
Oh, and a liner? Well, any old surplus store'll carry one. It's just basically a poncho liner. Or, try this site:
Liners and parkas galore!
hehehe
Cheers mate,
Adam.
PS: I said it before and I'll say it again, all you English folk's ENGLISH is rubbing off on me!