Raised panel lines

Couple options:

 The easiest that I use sometimes, is to just score in the line with an exacto knife. I use the middle part of the blade (little to no control with the tip), just slide it across from one end to the other. It really doesn't stand out as much as you would think it would.

 Some people will stretch sprue, real fine, and glue it on. (haven't tried that one)

 Another option (haven't tried this one either), is to use masking tape on either side of the panel line, leaving an openning the width of the line, and build up a few layers of paint. When you remove the tape, your paint "panel line" is left in place.

lukeeluciano

I have the 1/48 revell warthog model and it has raised panel lines, i will have to putty the seams and when i sand, it will remove the panel lines, how do u bring the detail back?

PAINT!

Seriously just take masking tape and mask out where you want your new raised panel lines, then just airbrush them back in place.  Build up enough paint and you have a new raised line.  Any mistakes can be fixed with 600 grit sandpaper. If your tedious and careful, you can also restore raised riveting as well.

I have done this on several models and its works great!  Much easier than building a new line out of sprue or hair etc.

Another masking and painting method is just to mask panels rather than the lines themselves.  When you remove the masking tape one can see a faint line surrounding the masked area, which simulates the panel nicely and is much easier than trying to mask a constant-width line.