I am looking for some type of felt tip pen that would be alcohol, glow fuel, etc proof.
I need to draw details such as doors, windows, panel lines on Monocoat or Ultracoat.
Any suggestions. Thanks.

Unless someone else knows different, I dont think any are without some type of fuel proof clearcoat. Parma International (rc car bodies and paints) makes a fine line marker for hobbiest, but never tried one yet with fuel on it.

I've used Sharpie permanent markers and when dry about the only thing that will take it off is denatured alcohol.

I am unaware of any "fuelproof" markers. I've always shot a clearcoat over detail lines. BTW, the burned residue of fuel and raw fuel will remove marker lines.

Thanks. So, how then are details put on the film covering? Some type of brush paint with masking tape?

Sorry, I didn't see in your post that the detail lines would be going over film covering. Paint as a general rule, any paint, does not adhere well to film. My suggestion would be to use a fine line detail tape. This can be found as narrow as 1/64". I would put it on then go over it lightly with an iron set to low to really get the adhesive activated. Careful with the temp though.

Tom, thanks for the advice. I will try the narrow tape with some low heat. I have used wider tape around a canopy but it generally comes loose after some time of soaking with glow fuel exhaust.
I guess I am surprised that nothing 'simple' really works with so much concern in the area of scale and details.

Hi!
There are no felt tip pen that are fuelproof! And no tape will look good on Oracover or any other plastic film. It will also be very easy to remove accidentally. Sorry!
The only method I know of, if you want to put panel lines and details on Oracover is to clear cote (spray paint) the whole surface afterward (or carefully brush stroke each individual line and rivet[]). Only 2 part boat polyurethane paint (like International 2-part boat paint) work here. Auto lacquer, like Sikkens Autocryl 2-part lacquer will not work as it doesn't adhere well to Oracover.
Regards!
Jan K
Sweden

Carl Goldberg models if I remember carry 1/64" pinstripe that claims to be fuel proof.

Not trying to be a smart a__ but scale airplanes are not covered with film covering. I have some vynl stick on material with lines and simulated rivets that came with my GP Stearman I will give to you for the cost of postage. Send me an email.

I found this item that might work if fuel proof paint was available.
Any experience with this type of tool?

Hi!
Bought one 30 years ago....did not suit modelbuilding (to broad line)...or anything else either.
Pinstriping is more easily done with a sable brush.

Regards!
Jan K
Sweden

Hi!
Plastic film covering not suited for scale models....???

/Jan K

It would seem that 1/64" is fairly small. That could depend on the size of plane being built or what the expected detail is to be.
I don't have the best steady hand for small sable brush work. What you suggest may still be the best.

Try a "Ruba-Dub" laundry pen,Its like a sharpy but very recilliant.

Monokote, with rivets and panel lines.

Now come on Pilot, you know you can't use film covering on a scale model.

Jan, can you tell us more about your methods? Your DC-3 is magnificent. Jim

You probably have a good chance with a Rapidograph (drafting) pen and drafting ink.

Bill

I've used the Rapidograph pens on many models myself and they do a great job but you still have to fuel proof when finished.

Carl Goldberg has a panel line pen, but it is not fuel proof either.

I am a quite surprised. People with many years of experience building planes and there still is no such thing as liquid fuel proof paint?
If there is such could it not be used in a Rapidograph pen or a GB panel line pen or paint brush?
If painting is so much problem then I guess just cut thin strips of film covering and iron on? I know that is fuel proof.

There are many fuel proof paints on the market however drafting pens are not designed to use paint.

I cut out thin strips of monocote, using a sheet of glass and a t-square,then after its on the plane i go over it with a q-tip dipped in latex polyurathane.I flew all last summer on this plane with good results,so far.

I'm still waiting for a reply from HalH