Everybody sells new replacement lines for about $75 bucks a pair. Buy them.
Or you can half ass it and your insurance won't cover the fire claim due to "improper repair."
Your call....
As a shop owner, I have had to testify about "repairs" before. Boat insurance companies (we did a lot of performance engines for them here, and I wrote for "HOTBOAT" magazine for years) are very particular and have so many disclaimers in the fine print, you would not believe!
Insurance companies are happy to take your premiums, but they don't make money paying claims.
TIMINATOR