I have some Faber-Castell India Ink Artist pens and was thinking of using them for panel lines.  Using auto base coat/clear coat.  Do I have to put a sealer over the ink lines before I put on the clear?

THX

Disclaimer: I haven't tried it over the Pitt ink.  I do have a Pitt pen.  I found it on the flying field, curiously.

Thanks.  No time for a test panel.  Have a firm date for the project completion date.  I'll leave them off for this one and try a test panel when I get the time for the next one.

I'm pretty sure it's not.  It's a base coat that counts on the clear coat to protect it. 

I have sprayed the Nason two part over india ink lines, an also over Sharpie lines, with no negative results.  I do a dusting first, wait 5 minutes, then spray normal.  I still recommend a test panel, no matter what the materials.

Yes Dan, I've probably sprayed a total of two gallons of the stuff.  However, the majority of that has been on my custom guitars and basses.  But I have used it on five stunt ships so far with no bad experiences.  It is ready to spray as soon as it's mixed.  Watch it on verticle surfaces as it's quite easy to overshoot it and get runs.  and man alive, is it ever fun to sand out a run of this stuff if it sets for a couple of days.   
I have sprayed my colors on those five ships using Krylon, and let the Nason be the fuel proofer.  My current number one ship has close to fifteen gallons through the 75 in it and there have been no problems as far as fuel proofing.  The previous ship put over a thousand flights in with the same results.
To say I love the stuff is to put it mildly.  It stays flexible, also, and that's a must for both of my applications.
A hint; the catylist will draw moisture and spoil if not stored properly, and yes, you can ask me how I know this!  I now make sure I tighten the cap securely and then seal the can in a freezer bag for storage.
a word of caution, and I'm sure you already know this; wear a good mask and have excellent air circulation.  The term "death paint" probably isn't too far from accurate.  But...if you always take care to spray the proper direction as far as the exhaust fans, there shouldn't be a problem.  Shucks, there's nothing wrong with me...me...me...me