How do you attach these things?

I wonder how do you attach side mirrors and spoilers\wings?
i tried to use glue, but didnt work.

You can either use superglue/cyanoacrylate for an immediate bond, but be careful of putting too much on in case of the glue fogging your paint work. Alternatively, you can use 2-part Epoxy resin, which will give you a stronger bond when dry. you may have to hold it in position until it sets (4-5 mins).

If you plan to paint the whole body, including the mirrors/wing, then you'll get away with just normal liquid cement.

If you want a really strong bond, drill a little hole in the part and insert a metal/plastic rod. Glue this in, and then drill a corresponding hole in the body and glue that in accordingly.

Hope this is of some help.

A search of the forum turned up this thread which I think shoud answer about all your questions.....

http://www.automotiveforums.com/vbulletin/showthread.php?s=&threadid=67869&highlight=attach+mirrors