Hey Bo I need some help here

Hey Bo! Hello my name is West and right now my credit score is 548 (I know it sucks) but what I wanted to ask you was can I remove old student
loans that went into default and closed but then i paid them
(they show as paid but i know they still are negatively effecting my score) and some old closed chargeoffs? Plus does piggybacking still work
(even a little)? I'm going back into the military, the army and my new job in there will require a top secret security clearence wich means they will check my credit so i'm trying to get things off and the score up as much and as fast as possible. I figure I have 2 to 4 months. I know I should have done this along time ago.
P.S. What is the average jump in score I can expect by removing a few of these items? P.S.S. I am a credit report dummy! I never even looked at my report till here recently and I mean ever!
-------------------------------
you can try
it may or may not workdispute them as not yours piggy
backing no longer works i think
new law the thing to do is get new good credit going
if you have no good credit then all anyone sees is the old bad credit
if you do have new good credit the old bad credit looks much less bad and your score jumps
-------------------------Applied Bank Secured Visa® Credit Card- Best card to help really bad credit. You WILL be APPROVED and reported to bureaus for good credit but you have to deposit funds to overcome the really bad credit. AKA secured credit card. these folks apporve anyone------------------------
I must have at least 3 reported credit lines that are current the past two years) and rated (open at least 12 months).
This is the very best way to raise a credit score 50 -250 points over no more than a 2 year period and sometimes in as little as 6 months.
Pay any credit lines down to less than 80% debt to maximum high credit limit. If I bought a car or home in the past year or so, my score will be lower because I owe the total I could borrow. One could borrow the total amount and pay the down payment after the loan originates to pre-empt lower scores with car loans.
Negotiate collections, late payments and charge offs with the original creditor. Do not pay before you get a company letter head signed agreement for future disputes.
Validate any duplicate collections. Collection dates cannot overlap the original creditor dates. Most collections pay 20 on the dollar so negotiate lower payouts. File Complaints with the FTC if a collection agency fails legally verify they own my debt. Raise score 50 - 100 points.
Dispute errors here. Use certified priority mail.
Have all 3 totally free credit reports and scores. Quickly decide what bad credit I might have the best chance to raise my credit score fast. Monitor progress.
Pay off all legally verified debts and ask for total removal or paid in full as agreed when I agree to make payments or settlements. Raise score 10-80 points fast. Get sign agreement on company letterhead before you pay.
Eliminate local finance company loans.
Local finance company loans look bad and often times show up in duplicates from refinancing. Raise my credit score 10-30 points free.
Re open any closed credit cards that are reporting past bad credit and pay perfect for 1 - 2 years. Then ask the creditor to report only the past 24 months activity because revolving credit is rated only 24 months anyway. Raise score 100 points.
If I cannot find past bad creditors, then I dispute the credit as not mine.