Tyranid/Ork Claws and Brace for Impact

[NoisyAssassin]

How do people play the interaction between the claws available to orks and 'nids and brace, specifically as to whether brace keeps them from grabbing on?

I don't have the rules in front of me, but summary - claws give 2 attacks, each hit on a 4+, if two hits are scored they get to grab on and keep going at it in subsequent end phases. Brace for impact is a 4+ to "ignore" a hit. In the case where 2 hits are scored and one of them is braced I'm inclined to think that it would also be ignored for grabbing purposes and thus no grabby-grabby.

Just want to confirm that I'm playing it right

[Xca|iber]

That is how I would play it as well. A hit that is saved away, for all intents and purposes, never actually hit, and thus would not trigger any on-hit effects such as claw-grabs.