"Do NOT remove hood."--Rdanz

Sounds like a quote from somone who has help on projects... or has not had a four foot by four foot floppy item prepped with CONTACT CEMENT accidentally touch at the wrong place when trying to apply it...

If you turn the hood upside down on padded saw horses... then , alone, you can follow the directions for contact cement.. very important....and use the ' 90' 3m spray on made for hood pads....

and take waxed paper and cover a dozen or so 1inch by 1inch sticks....then you can measure and mark on tape the center line for the hood...

then you take the pad and place it the way it will go on the hood .... but held off the hood by the sticks.... and you can align it exactly above where you want it.... then starting in the center and pressing out any air bubbles as you go... ie, before taking out the next stick over.... you can apply the perfectly lined up pad to your hood ALONE..... they way I always have to plan projects...

I do not agree that only loose old cement needs to be taken off... I think it needs to be chemically clean and dry before applying the spray on Contact Cement...