How many coats of 170 primer?

I know there's a recoat window (for the MTK topcoat) of about 3 days. How many primer coats would your recommend, however? I shot the 170, let it dry for a few minutes, and then added another coat. After allowing 30 minutes to dry, I flipped the rims and shot the other side. Is that sufficient coverage durability wise? Looks great to me.

By the way, I used a green 3M masking tape on the rubber, and it stuck fine. I know this has been a topic of considerable discussion.

Once again the recommendations I've learned from this forum has been invaluable.

Thanks

Paul

That should do just fine. The tech sheet for 170 says one coat but I always use two. That thinking goes back to when I was using PPG's premier epoxy primer, DP (DPLF nowadays). That product calls for 1-2 coats -- two coats specifically if a chemical pretreatment or wash (etch) primer is not used. I use epoxy direct to sandblasted metal w/o any pretreatment so I got used to using two coats and it carried over to my use of the 170. I think two coats is a good idea in this instance since the 170 tech sheet is not as specific as the one for the DP.