I haven't had much train time since before the holidays but my last few conversions only made it through the coupler process. Haven't weathered a thing but it's been cold and raining here, yes even in sunny southern California.
Lionel Legacy got the fixed pilot Kadee conversion
Atlas GP60M & Bs, ABBA..... prolly wont do all the handrails unless I can buy them from Atlas
Legacy GS4 got Kadees front and rear, along with some steam & air lines, a lot of detail painting
Full custom MTH caboose rebuilt from the frame up
Sunset 3rd Rail's SD7 Tigers, these just need weathered now