How do I loosen this up? My buddy just got a Pelikan M800 and it's STIFF. (pen was sitting for 10 years in a shop under a hot lights) Where should he apply lude?

If it's just dried ink inside, let the pen cool down first (to room temperature), then hold it in your hand for some time, to warm up the air inside. After that, just put the pen with nib down into some water (only as high as for the usual soaking, only the nib & section in water). As the air in the pen cools down, it will suck up some water that will loosen the dried ink inside.

If it's not dried ink, you can unscrew the nib & feed from the section, and re-lube the piston. See http://www.fountainpennetwork.com/forum/in...&hl=pelikan

If it's ink that stiffens the pen: Water and patience.
Unscrew the nib (if it does not work, soak until it comes loose). Fill the pen with water and let it rest upside down so that the water can sit on the piston. Be patient. This can take days! Change water occasionally if dried ink is dissolving.

Remove the nib and feed assembly by unscrewing it (standard right hand thread). Obtain some pure Silicon Grease from a Scuba dive shop or from one of the dealers on the internet who sell pen repair products (ie Tryphon). Using a toothpick apply a small amount of grease inside the barrel above the section where the piston will travel into it when extended. Run the piston down into the grease and back up a couple of times and you will be back in business.

Now this assumes that the pen is clean and has not shrunk or anything silly from neglect. Check with you fingers by running them down the barrel to see if you can feel any swelling or shrinkage, the barrel should be a smooth perfect cylinder from the outside. If it is not, then the barrel may have shrunk or warped from the heat. You might consider sending it back to Chartpak if this is the case.

PS, DO NOT substitue for the Silicon Grease, anything else runs the risk of damaging the pen. Silicon Grease is non reactive with the pen materials, and is used by all the Pro's. There is no need to use anything else.

Cheers,
Sean

Won't the silicon grease running up barrel react to ink next time the Pel is filled? Should the pen be cleaned again after doing this?

No, because silicone grease is water resistant and doesn't react to ink.

I have done this very thing, on the advice of Pat Acker, at John Mottishaw's site. The trick is to use only a TINY amount. No lumps of grease. I used a cotton swab and barely touched it to my block of silicon grease before swirling it in the barrel. Worked beautifully.

Where can I get the grease online? I can't tell which is 100% silicone as some seem to be blends? The stuff I've used with flashlights isn't 100% silicone grease

http://www.tryphon.it is the source for a lot a good things, silicone grease among others.
Good luck,
d