Enhanced panel lines ?

I agree you could probably find more help in the a/c forum. But in any case, are you talking about raised or recessed panel lines? I use different techniques to accentuate both.

With recessed panel lines I use an oil based wash on top of a coat of Future floor polish.

Let us know which type of panel line you wish to highlight.

Couple of different methods I have used are:

Run a very fine pencil, preferably quite soft, down each panel line, then make sure you varnish imediately to prevent smudging.

Apply a gloss varnish coat to the model, then with a cheap water colour set mix up a thick paste and apply along the panel lines. Allow this to dry thoroughly, then with a piece of damp kitchen towel rub the paint off, making sure you rub at 90 degrees to the panel line. This should then leave paint in the panel lines. Once complete simply apply the top coat of varnish.

Alternatively use a very thin mix of dark acrylic and water, and simply apply to the start of each panel line. Capillary action then draws the mix down the line, and dab of any excess with a cotton bud. Find that this works really well on wheel bays and gear doors.

Karl

Might try posting this over in the Aircraft Forum