The Rapid Rescore strategy requires proper paperwork.
One exception, of course, is if you're over extended to begin with. This is the infamous area where you've heard of all the scams. Look for any fees that you pay monthly that could be reduced to increase monthly income. When this situation arises, two monthly payments are submitted each month. This strategy is one of the oldest credit building techniques around. Eating out for any meal is always more expensive than cooking or making your own food. The Rapid Rescore strategy requires proper paperwork.
If they have perfect credit, now you have a perfect account. Credit report errors easily disappear by using a simple dispute letter.