The light as mentioned above are a standard KFS item and provide a perfect basis for the modern custom truck work.

I just had to make my own frames.
I started with a square pattern on a "milimeter paper". (We call it "milimeter paper" here, I don't know what is the proper expression for that in English)

This pattern was transfered to a 0,5 mm plastic sheet simply with a pin to mark the corners and scalpel providing the lines.

Then the sheet was cut into single stripes:

and further into separate pieces large enough for two lights and fitted with framing made of 0,5 mm plastic strip to form the final part.



What you see in the early stage on the part is the black Loctite 480:

It is a "super glue" but has some special properties that I like about it:
-it is not as brittle as the classic clear super glue (Loctite Super Attak for example)
-it needs a bit more time (few more seconds) to harden that gives you enough time to insert the pieces in the correct position
-it is not as hard as the usual clear super glue so you can remove it easily when sanding the part
-it is black so you can easily see if there is any glue left on the part (and where) when using this glue instead of standard putty
Now why am I using this glue both as a putty and glue instead of standard stuff?
1) It's somewhere between a standard super glue and modelling glue (Contacta from Revell) so it gives me enough time to put the part into correct position but is hard in a few seconds. It does not melt plastic.
2) It could be easily used for filling small gaps and slots when gluing the parts together. Again you don't need any extra time for putty to harden, just a few seconds.
3) There is an extra trick how to remove the excess glue from the part where you don't need it. You just apply a special liquid that melts the super glue on a part using some fine brush (like these ones from Microbrush

) very gently that will allow you to remove 90% of the excess glue and just sand the final result very gently. The liquid is called "debonder" here and it's just a clear liquid that melts all the cyanoacrylate glues but does not melt plastic.
I can't imagine making my finest parts without this stuff. I am not telling you that this is the only way but just the way that I do it.