According to the MagnetPaints dot com the nearest one is 65 miles away but its up the interstate so its a fast trip. I will call and make sure they have it before I make the trip. Also there might be a store or 2 nearer me that has it, will make some calls. Whatcha got in mind?
OK, with high heat and humidity you want to prevent ML from skinning in the roller pan and on top of the coating in the can or you can get chunks in the final finish.
Get a clean/new pump spray bottle and put some solvent in it. Every time you open the gallon and pour some more coating into the roller pan, spray some solvent on top of the coating before resealing it.
In the roller pan, every so often spray the surface of the coating a little to prevent it from skinning.
Reason I recommend the S8 reducer is that it evaporates the slowest of all solvents that are compatible with ML.
You can also use xylol/xylene for this and avoid the 65 mile drive. MEK or acetone will flash off way too fast so avoid that.
Home depot sells a good spray bottle in the cleaning supplies aisle.
Oh, most important:
EVERYONE/ANYONE buying a 1 gallon kit that does not include a roller pan - Avoid using a wide 9" pan like you would use to paint your walls.
Home Depot and Lowes sell a narrow pan like the ones that come with ML 2 gallon kits.
You need to pour too much coating in the wide pan to coat the roller and with less surface area exposed to the air the narrow pan will save you some grief and waste less coating.
In less than 60 days the 1 gallon kit will be revised to include a pan, and some other goodies that only come now in the 2 gal kit