> Can you recommend a specific glue brand? I have the red rubber coated 
> broad pliers but the last pen I used it on without a buffer it dented 
> which I thought was what the red rubber coating was designed to prevent. 


Sure.  Try Testors liquid plastic cement, in a clear bottle.  It's mostly MEK (methyl ethyl keytone, I think).  Most of the liquid plastic cements are formulated similarly.  Avoid using any cements containing carbon tetrachloride.  It's super bad stuff.  Testor's also makes a semi-viscous plastic cement, in a black squeeze container.  It has a syringe applicator, and since it doesn't flow, it can be easier to control.

 

About applying pressure to a tube, I've found that in order to get even pressure, it must be applied over the entire surface.  Small hose clamps, available at auto stores have worked for me.  Again, if the clamp is applied directly over the glued area, the glue may seep out and flow underneath the rest of the clamp, so be careful.  Any pliers, even with padded jaws, apply pressure from two sides, and can easily distort the shape of the tube.  Cast or extruded plastics, such as acrylics, take on a "set" when cured.  If a piece isn't processed precisely within time and temperature constraints, it can have an internal weak spot that shows up under stress, in the form of a crack.  

 

Good luck.  Try to enjoy the experience.  Andrew Harmantas, in warming up Tidewater Virginia  
 		 	   		  
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