Welding Plastic

Hello all.  As you can tell I'm new to this forum.  I have been doing car audio for about 6 yeras now and have tried my hand at tons of different projects.  I can fiberglass like no other, but when it comes to making two plastic panels look like one, I suck!  I will give you some background on what I'm trying to do so someone out there can give me some pointers.  I currently have a 2000 Civic.  I bought a X-Box and a Clarion 7" widescreen LCD.  What I'm trying to do is put the LCD screen in the dash and make it look stock.  I do not want it to look like it was just screwed down, I actually want the front shell of the monitor to be "welded" to the radio bezel so I then can paint it and have it look like a factory option.  I have tried to make fiberglass stick to plastic in the past, but no matter how much i scuff, it doesn't stick when the part bends, and plus I do not have alot of room to really fiberglass, nor width (I don't want it sticking out really far.  I heard there is like a Bondo type material, but for plastic bumpers.  Someone told me it flexes, adheres to plastic, and you can sand it, but he forgot the name.  Does anyone know?? Thanks for the help!!

shoot me your eamil and i can shoot you some step by step pics.....i have the steps from cutting the dash to what it looks like dyed to match. lemme know

hey i wouldent mind seeing that audiomechanic if you wouldnt mind

shoot me an email address

laxfreak04@hotmail.com

you can also use epoxy from West Marine systems to join plastic to plastic or fiberlass to plastic or wood to plastic, I have also used it brushed over  the foam on dashes and such to bond things to it and strengthen it up. It is available at most paint and body supply shops or marine repair supply storesMy mechanic told me, "I couldn't fix your brakes, so I made your horn louder"