I have a current thread on this called "Cracked Luggage".
The first and most important thing to do is determine which plastic you have there. ABS, most likely, but not assured. There may be a symbol on one of the panels that will indicate your type, but don't count on it.
I've also looked at both of the links you put up and there are also Youtube videos showing them in use. The Plastex looks good for ABS.
I have a 1.5 oz bottle of Plast-Aid that I'll sell you for cheap. Exactly 2 drops of solvent have been used.
Put a drop or two of solvent from the Plastex, or whatever you want to use, on the back of your piece to be repaired. If you have the right stuff the plastic will soften.
There is also welding, and that's what I'll use because I can't identify my plastic or find an adhesive that will stick to it.
MrBob screwed with this post 11-21-2012 at 11:35 AM