Powder coating protection

[Carl cobra build]

Hi All

Currently building up a car from chassis up. The chasis is powder coated and am tring hard not to damage the coating. Any suggestions on what I can use to protect whilst working aroud the coated parts?

Also what really good polish could I put over the paintwork to make it last? I see there are some good products out there that suggest 5 years of protection. Any protection / spray you would recommend.

Any help much apprciated.

Carl