Weird thing with final painting SEM trim black

[1batt4u]

So I finally painted the under body of the car as well as other parts. Came out Great!!!

The top coat SEM black trim paint has to be mixed 1:1 with reducer. I mixed it with Lacquer thinner as I read online while researching. I tested it before hand, came out great and hold good!

Only weird thing is on the hood some weird spots started appearing. After 3 primers and the first top coat it was good. After the second top coat I noticed some spots coming. I decided to make sur eI get them good on the third time. They became more noticeable.

What in the world are they, how and why did they appear??

http://i57.tinypic.com/xbbls1.jpg

[Lwanmtr]

Looks almost like you're seeing the structure where the material is thinner. maybe using the thinner is causing it to soak in more?
The bottom of the hood is fiberglass or plastic, yeah?

I've been just using the spray sem trim black and have been getting great results.

[1batt4u]

Every where else I sprayed came out great and hold good, strong.

Did you use aerosol spray paint or spray gun with air compressor?

[Lwanmtr]

I just use the aerosol can. the cost is decent at $11 a can..was able to paint the rear deck, engine cover, luggage compartment, and other misc parts with just 2 cans. Bought more, of course cause I still have louvre, trim, bumpers to paint.

[DMCMW Dave]

Probably should have primer sealed it.


Sent from phone

[1batt4u]

Probably should have primer sealed it.


Sent from phone

I did primer it, 3 coats. First top coat went on good, it was the second coat when the marks started appearing.

[Lwanmtr]

Im not super experienced with auto painting...but I've seen that effect on plastic models when the paint reacts with the plastic and thinner portions turn lighter than the rest, almost like theyre backlit.

Have you tried using the paint without thinner?

[SS Spoiler]

I think it looks kinda cool....

[1batt4u]

Im not super experienced with auto painting...but I've seen that effect on plastic models when the paint reacts with the plastic and thinner portions turn lighter than the rest, almost like theyre backlit.

Have you tried using the paint without thinner?

I did when I got the paint, I was doing tests. I comes out with a texture, or orange peel as known in the paint world. The can writes to reduce it, 1:1 mix. I did research online and said to reduce it with lacquer thinner. Results are great, smooth, color is great, holds up good. Just the hood came out like that. I'll try painting it again.

I was thinking if weather played a role. It was 90 that day no humid.

[Soundkillr]

I did when I got the paint, I was doing tests. I comes out with a texture, or orange peel as known in the paint world. The can writes to reduce it, 1:1 mix. I did research online and said to reduce it with lacquer thinner. Results are great, smooth, color is great, holds up good. Just the hood came out like that. I'll try painting it again.

I was thinking if weather played a role. It was 90 that day no humid.

Did you paint it while it was sitting in the sun, and the hood warm? It's possible, although unlikely that the thermal effect caused the paint in that area to flash differently, due to the fact that will will retain thermal heat differently. I have seen a similar effect on houses that have been painted on hot days. With a satin coat, or flat coat, the paint will flash quicker, and in some cases you will see the studs going down the entire house, due to thermal effects. The paint on the face boards (above the studs) dries even faster than the flash out in between the studs on the face boards. I imagine a similar effect could be seen here. Maybe.