Introducing a Fancy rat to a normal one?

[caitlin]

I already asked about introducing rats but I just wanted to ask if one of the rats is a fancy rat will he not at all get along with normal rat? Cause no matter what I have tried they will not get alone. D: I have tried EVERYTHING. So it cause one is a fancy rat? I'm was just wondering. O: But some more ideas for helping them get along would be great. They are both boys full grown. My fancy albino is over a year and the hooded normal one is is 6 maybe 7 months now. So is there just no hope? Should I give up or keep trying? I have two big cages for them. But I wanna keep them in the cage In just got that is almost as big as me. xD So yeah anything helps at all thanks.
@ Lisa
I though fancy was what you called a rat that is bigger then a normal rat. O:
I have tried the scent masking but not with that stuff. I will for sure give that a try.
But they did fight in a neutral area I did put them in the bath and they did fight really bad. D:
My big albino bit the smaller one. ripped out some of his hair to. :<
There was a bit of blood. So I feel there is no hope for that at all.
I'm very scared about neutering them.
It cost 180 here and I worry about what can happen to them after.
I love them both and would hate if they change in anyway.
They are both very sweet.
But would waiting till the younger one is a bit older help?
Cause I want neutering to be the last thing I do. D: