"I do very good in the makeup department," Jenner insists to his stepdaughter in a sneak peek at the two-part special

Assigned male at birth, Bruce Jenner revealed in his 20/20 interview with Diane Sawyer that he had intended to transition into a woman as early as the 1980s – so, it’s no surprise that he’s learned a few tricks of the womanly trade along the way.

In a conversation with stepdaughter Kim Kardashian West in a sneak peek at E!’s upcoming special, Keeping Up with the Kardashians: About Bruce, the athlete says that he’s “had secrets all my life,” adding that “it’s tough not to have secrets.”

At that, he pulls off a shoe to show off the bright pink nail polish he’s been hiding, sharing that he paints them himself.

In his interview with Sawyer, he said that he was looking forward to wearing nail polish for long enough that it could actually chip off, which spawned an online movement with the hashtag #PaintYourNailsForBruce.

Jenner, 65, also reveals that he’s “actually very good in the makeup department,” insisting to Kardashian West that he could even do her makeup. This prompted a giggle from the reality star, who is likely doubting that any but the most experienced makeup artist could contour a Kardashian to their satisfaction.

(After all, she did warn him not to steal her glam team!)

Keeping Up with the Kardashians: About Bruce premieres May 17 (9 p.m. ET) on E!.

Editor’s note: Per Bruce Jenner’s request, PEOPLE will continue to use male pronouns until otherwise instructed.

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