Car Paint is lifting. Why?

Question

Recently I attempted to remove the rust from my Nissan Sentra Classic 1993 vehicle with the following process:

x 120 Grit Sander
x RustCheck Rust Converter
x Mineral Spirits
x Rubbing Alcohol to clean away remaining dust
x Tremclad Primer 1L (Grey - Inhibits rust for Iron & Steel)
x Duplicolor Auto Spray

After the above process, i now see scaling on the overall job, as if the paint is being lifted. What did i do wrong?

Your recomendation on redoing this job would be appreciated.

Thanks

Answer 1

it could be that some of the chemicals that you used are acting as a paint thiner/striper. I would recommend either taking it to a body shop and getting there advice on it because I'm not to familiar with body work, or you can try removing the paint that is coming off and repainting the area with some touch up paint that you can buy at walmart.

good luck and i hope all works out

Answer 2

Its your materials. They are mismatched. You should use only compatible automotive products. Use the same manufcter primer and finish paint.
Don't use mineral spirits or alcohol to clean use a automotive prep to celan surface. Many paint companies do not recommend wiping the primer coat with a cleaner, use clean water. Use a primer surfacer over the Tremclad or use the duplicolor primer.

Answer 3

this is caused by moisture underneath the paint making the bubbles. a prime example is rust from underneath. it may be a failure of the surface coat allowing water penetration and thus the surface paint lifting. a sort of pinhole effect. either way it wont get any better. It needs to be stripped back to bare metal in the bubbled areas and treated/repaired before repainting. Good luck.

Answer 4

get a gravity spot blaster and a 50LB bag of silica sand

Very cheap about 30.00 for all of it.

Now cover the area around the rust, and blast the rust off it.

Next take some bondo and cover the imperfections -
Sand smooth.

Mineral spirts is not the choice
Neither is rubbing alcohol

Prep-Sol is what you want for both jobs.

Next get yourself some sandable primer and mix 50/50 with reducer

now 800Grit sandpaper the whole car again

wipe down with prep-sol - dry it off as soon as you put it on.

Now your ready to spray again

Answer 5

Would've been better to cut the rust out and weld some new metal on. Because if you even missed a little rust it would start spreading like cancer again. And thus your paint will start lifting.

Answer 6

Probably because you didn't take down to 600 or 1000 grit.