Thank you again, Ching
May be I'll try the color (PS47) that you have used on no.3---the fairlady.
I have also find the catalog on tamiya paint. On page 4 there is a comment on the use of
ps46 and ps47, but in Japanese. I GUESS they suggest to spray PS47 and then PS5 to bring out the color.
I hope I have GUESS right and may be I'll try. For your reference: