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The only place for a coil spring is up Zebedee's arse
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Folks, I need to reset the front passenger window but it's a bit slow and won't do the full cycle in time.
I'm thinking a quick squirt of lubrication would help - is there any recommended type? Silicon? PTFE? plain ole WD? I'm not sure how much rubber is involved in the door.
It's a pathetic question but I hope you don't mind me asking before I just bugger it up with the wrong stuff :)
Thanks!

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I used white spray grease on all the sliding bits and quadrant on mine. If it's sticking in the rubber, talcum powder.

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I haven’t delved into the doors of my P38 yet, so any advice offered might be a tad agricultural… based on my Defender.

For window mechanisms I’ve used whatever I’ve had to hand. I still have most of a tub of Castro CL grease (sticky, waterproof, lime-based I think) but these are manual windows.

For the glass/rubber channels I’ve had good results with a spray tin of Halfords glass and rubber lubricant, but I suspect it is silicone. I usually use it into the open channel (I.e. window down) and in conjunction with a paper rag to avoid overspray.

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I put windows down and spray GT85 down window channels easy with thin plastic tube fitted to the spray nozzle
I've use this method on all my vehicles

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Dry silicone for windows and sunrooves, less mess, clean to touch after and an annual once over is usually good

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Yep, silicone is what I use.