Fluid Film, Good rust inhibiter. What are negatives Options

[rstover]

On places that I can't or won't paint I use this. I used it in the rear section of the tunnel from the gear shift to back. On the front part I was able to clean and paint. I used it in the bottom of the floor pan. The wiper assembly was cleaned using it.

I was putting a little on the metal parts of the valve assembly for the fresh air and defrroster and was surprised to see how it seemed to blacken and clean the plastic. It seemed to work better than back to black and really made the parts look new. The label say it will not harm plastic and I have had it on the air valve for over a week and it seems to stay the same. As of now, unless I hear something else I plan to use it on the air box.. I would like to know if anyone has had experience with this product.

[burton73]

It looks like it makes the parts that you show slick. If masking tape will not stick to it, paint will not stay on well. Perry is right. Are you going to paint the underside of your car?

Bob B