I have had good results with Testors lacquer paint.
I have used Testors Model Master two part paint system, with base coat and clear over the top. The clear is required with this paint. Look in the Pictures section of the forum for "New Unlimited Car" to see an example of the finished paint.
I have also used the Testors One Coat Lacquer with and without clear over the top. This paint does not require the clear coat if you want to save a little weight. Look in the Pictures section of the forum for "New Eliminator". I did not clear coat that car to save the weight.
Also look in the Pictures section of the forum for "New Scout Car". That car was clear coated with Testors One Coat clear Lacquer.
I used Duplicolor scratch filler primer before paint on all three cars. I agree with Benji form JBD Racing, the primer is heavy.
It also helps to fill in the wood grain with a wood filler putty and sand with 800 grit before prime or paint.