i have a relatively large surface model that i am simulating and i need to find out how much the total weight of the surface is when it has been assigned the thickness. how do i go about doing this?

Take the surface area, multiply by thickness, multiply by density. That's an approximation. To get a better number, thicken it and get the mass properties.

to do that i would stil need to click on each surface body and measure the surface area wouldnt i? or is there a quick way to select all surfaces and export their properties into excel?

As long as you have all of your shell thicknesses and materials defined, try running a static study. Use only one face as a restraint, and make gravity the only force/load applied. Then, check the reaction forces at the restraint. Simple calcs should get you the weight of the assembly.

You can semi-automate it with the use of Excel, where all you need to do is enter the area.

to do that i would stil need to click on each surface body and measure the surface area wouldnt i? or is there a quick way to select all surfaces and export their properties into excel?

As long as you have all of your shell thicknesses and materials defined, try running a static study. Use only one face as a restraint, and make gravity the only force/load applied. Then, check the reaction forces at the restraint. Simple calcs should get you the weight of the assembly.

-- Bryson