I don't like scrapping people's cards. Shockwave really wants to scrap people's cards. Beachcomber gives him a reason not to, while still allowing him to have a specific reason to be around. Shockwave lets you see the top card of your deck, so you don't have to guess with Beachcomber. Alas, once Beachcomber is gone, the temptation to start flipping Shockwave will probably still be there. Hence, "reduced scrap" Shockwave.

In the mean time, Start Your Engines and Hit-and-Run give Beachcomber plenty of opportunities to transform. Multiple draws of 3 cards will positively stuff your hand, ideally giving you the ammunition needed to unload on the other team with powerful weapons, strength-pump actions, and extended card play through Brainstorms and Field Communicator.

Also, Backfire is that card. And remember that Nightracer provides tough while there's a secret action down, so it can be helpful just to put down a Spymaster's Ruse with a wait-for-it Secret Action for the sake of having Tough on multiple turns.