QD in the sun?

[Mike@ShineStruck]

I used to always use RivStar Bead it in direct sunlight
doesnt streak even on hot surface
still have allot of this brand as I used to be a dealer for it

 

[d33p]

I have used Meguiars D115 in the hottest of sun and it works great. The great thing about D115 is you can change the dilution ratios for hotter weather.

What ratio do you find is good for hot sun? Ive tried 4:1 just to test it and it did streak but only minimally.