I have been doing paint testing for the last week or so and I figured it would be handy to pass on what I know so far. Some of this is stuff I had read does not give good results, however, I wanted to test for myself. I used poplar for the tests since I had some handy. I was trying to get a metalic finish so I went with chrome enamel for the beginning tests.
First Tests:
The first tests were a massive failure. I improperly applied the grain fillers and also used an enamel paint with a clear coat lacquer which never works. Here is the result. The right is just the chrome enamel and the left is after being very careful with the Deft clear.
Moral of the story enamel + deft clear = fail.
2nd tests:
They are still on going but here is the update. I used Benjamin Moor Grain filler let it dry and then sanded it down with 220. I then used black Duplicolor sandable primer. I did 3 coats and lightly sanded between each coat. I then used a Duplicolor metallic silver on top of that. This is a picture of 3 coats of the silver.
It still needs more coats as you can see the light and dark grain that runs up and down the board.
During all my tests I have used Valspar spray paint (Lowes brand), Duplicolor, Deft and Rustoleum. I am happiest with the Duplicolor brand. The spray nozzle is the best out of the brands I have tried and the paint goes on smoother because of it. Valspar is the worst and I would not buy that brand again. It shoot an uneven, hard to control fog out of the front where the Duplicolor has a nice controlled fan.
Updates:
I figured I should update this post and also edit the above one as pictures are better than words. I condensed and added parts as well as adding pictures.
First Tests:
The first tests were a massive failure. I improperly applied the grain fillers and also used an enamel paint with a clear coat lacquer which never works. Here is the result. The right is just the chrome enamel and the left is after being very careful with the Deft clear.

Moral of the story enamel + deft clear = fail.
2nd tests:
They are still on going but here is the update. I used Benjamin Moor Grain filler let it dry and then sanded it down with 220. I then used black Duplicolor sandable primer. I did 3 coats and lightly sanded between each coat. I then used a Duplicolor metallic silver on top of that. This is a picture of 3 coats of the silver.

It still needs more coats as you can see the light and dark grain that runs up and down the board.
During all my tests I have used Valspar spray paint (Lowes brand), Duplicolor, Deft and Rustoleum. I am happiest with the Duplicolor brand. The spray nozzle is the best out of the brands I have tried and the paint goes on smoother because of it. Valspar is the worst and I would not buy that brand again. It shoot an uneven, hard to control fog out of the front where the Duplicolor has a nice controlled fan.
Updates:
I figured I should update this post and also edit the above one as pictures are better than words. I condensed and added parts as well as adding pictures.