Thanks peoples. I had try oils in this year after 20 years using of acrylics and i can say that i begin to love oils. On the other side, now i can`t give a receipts of any tones that i`m using. I guess that need some time for adaptation and after i can say "you need a 3 parts of titanium white, 1 part of vandyke brown and 1 part of cadmium red light" instead of "taking Vallejo panzer aces 343". I just mix a tones on my taste and understood "here need a few of red, here need a spot of green, this part must by more yellowish" but i can`t say a definited proportion, sorry. I just need more practices for it.