I used the Cobra Flex Foam Tire Dressing Applicator along with a cheap paint brush to get between all the ridges. The same procedure that I use with other (many others) tire protectants.
It is more difficult than some others. I followed the foam first coat with the Carrand brush applicator for the second. I really like the Carrand for gels.
Thanks for the tip! I'll definitely be trying the brush next time. The hex grip foam applicator I've always used works great for 'cream' type or dressings that are on the 'watery' side.
What kinda durability are you guys seeing with T1?