I was wondering if anyone recommends undercoating/rust proofing an RL. I realize the undercarriage is mostly aluminum but what about the sills, quarters, door panels etc??

 

Why not? I did my Integra last fall. I did wheel wells, spare pan, frame rails, all of it.

 

If you have snow, yes, otherwise save your money and time. Check out my thread on an Ohio RL I bought. It's pretty ugly underneath, had no undercoating from the factory or dealer even. Shameful. I will never buy a northern car again. Dealer said I got it for wholesale, which of course he is right, but a car like that is salvage value in the south.