Well, the RC900 finish itself won't (crack)... and in it's own way, if applied to a fairly consistent surface (dry smooth matt rust

) - can give quite a pleasant 'engineering phosphate-style' look & feel - IMO
On bright shiny metal, quite different, glossy purpley, again, maybe to someone's taste
Will try to dig an example image or two out
== I should think most quality finishes will stand up reasonably well to some flexure, certainly Eastwoods make that claim for their Chassis Black (Classic/Original) - in fact the latest Frost ads do go into a bit of detail about two toughness standards for EW Chassis Black, one now being more expensive than t'other.. so presumably they have been 'trying hard' to engineer better and better chassis type paints recently
