Finished painting the front calipers the other day, but the activator was put in a different glass jar and it was like a dried up jelly. Not sure how that will affect the paint life. If you're using the G2 paint system and can't paint all the calipers at once, you need to use an eye dropper to split the activator so that it stays in the ORIGINAL glass bottle. The bottle I used wasn't exactly airtight and if I had left it another week, it would've been useless.