1. Never heared of that but I guess it couldn't hurt. You definately do not want a cold model although that shouldn't be too much of a problem in Brazil.
What is important is to heat the paint can before using it. The paint will go on a lot smoother.
2. If they are the same kind of paint, it should be OK (ie: enamel) But you might want to make sure with someone that has experience with both.
3. Same as above
4. I never tried Tamiya on Zamac. Never had problems with Testor...
5. Yes, it is OK, however, you will loose detail as the paint might get too thick in places = unrealistic.
What is important is to heat the paint can before using it. The paint will go on a lot smoother.
2. If they are the same kind of paint, it should be OK (ie: enamel) But you might want to make sure with someone that has experience with both.
3. Same as above
4. I never tried Tamiya on Zamac. Never had problems with Testor...
5. Yes, it is OK, however, you will loose detail as the paint might get too thick in places = unrealistic.