Small impact on left top front of a Warrior that is fiberglass. About 6 inches of damage to side panel and 6 inches to top panel. Area is above cab. Bent metal roof trim which will be replaced. Talked to a boat repair guy and he says he'll remove loose stuff and fill with fiberglass/resin. Then grind, sand, paint. Sound OK? Figure a boat fiberglass guy is better thyan a traditional body or RV shop. Thoughts? Thanks.