Trim detail and conditioning tool?

Do you use anything special when applying plastic conditioners to keep products off paint?

I am careful, using microfiber cloths but still get some on paint edges close by.

What is a better application method?

 

I use a foam applicator to apply product to my plastics trim pieces

 

I do the same as DRP82. Picked up a set of different sized foam brushes at Michael's for $8.99.
I picked them up for a different project, but have worked great when applying rubber/plastic conditioner on my exterior trim.

 

I use a foam applicator or a MF towel, then I just buff the areas where it got on the paint. Then always buff again about an hour later so you don't get run off from the rain