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It really depends on how and where the boat has been stored or kept for the last 8 years. If it has been in the hot sun then there is a good chance that the black gelcoat has some oxidation on it. This was our Orange hull after 9 years of previous ownership. I removed the graphics to see this.
After a weekend of wet sanding, compounding, polishing and waxing it looked much better.
This was 4 years ago. You could try removing a small piece to see if you have any oxidation.