Yes. But you can't do the reverse. So if your primer is lacquer-based you can spray an over-coat of enamel on the top.
Yes you can.
NO, all you will have is thinner, less effective paint. Primer has a totally different makeup.
Yes, that was the original intention of urethane.
Engine lubrication oil will naot damage factory enamel paint finishes. However, it may damage aftermarket lacquer finishes. Also, brake fluid is corrosive to most paint finishes.
Most likely auto enamel paint.
Its not car paint, but Montana spray paint is definitely the best paint in a spray can. I dont think you will find actual car paint in an aerosol can, but I could be wrong.
This is the common car paint from the 1970s through the mid 1990s It is a development of earlier enamel paints and is still available for those who want it.
I'd give the paint 24-48 hours to dry thoroughly. If you lacquer too soon the paint may crack etc underneath. Give it 2 days in a warm environment and then it'll be okay to lacquer.
What you are calling "car paint" is probably lacquer based, and would really soak into a plaster ceiling. If you are doing a design or something, this may be appropriate, but other than that, not good for coverage.
Yes, that's very common. Be sure to de-grease it first,so paint sticks.
Use a straight enamel the wet sand it with 600 grit for hour and hours and hours and repeat for coat 2 clear coat can not be painted on with brush unless you a magic paint brush lol clear over clear does not work
I am not familar with "Acyrlic Urethane" paint, but I wonder if it is a urethane base paint that is applied and dried, but later has an acrylic clear-coat overlayed to bring out additional gloss. Urethane is more expensive, but lasts longer and is more durable than enamel or acrylic paints. Urethane and polyurethane paints are basically the same thing - toxic paints that require a complete body suit, full mask, and gloves for safe spaying while wet. I believe that Urethane paints are not allowed to be sprayed without a license in California. Applying different manufacturers urethane paints over each other without the proper advance preparation can cause chemical reaction problems that discolor or flake the paint and void the paint OEM warranty. Each manufacturer has their own urethane additive or primer that may allow their OEM paint to be applied over the original paint. You have to check with the paint distributor or manufacturer for details on this. This paint additive or advance preparation step is how many aftermarket paint manufacturers can make their own blend of paints to match the car manufacturer original fleet colors. However, paints made over 20 years ago may have chemical components that are not compatible with newer paints and may fail when Urethane is applied over them. For example I have a 40 year old VW that has OEM baked enamel paint on engine parts. If I apply urethane paint over the enamel, it will start to flake because of the engine temperature and chemical reaction between the paints. The best solution I have found for this enamel problem is to not take a chance - I strip the parts down to the bare metal and paint with a primer and then a black gloss urethane. Since the gloss component is already mixed in, there is no need for me to overlay with a acrylic clear coat.