Ask Brad Ep 20 | Catalyzed vs Uncatalyzed clear coat 

Very detailed and informative thank you

The safety and filtering of these chemicals needs to be explained better. 2k Spray max polyurethane contains ISOCYANATES. This is extremely toxic and CANNOT be filtered by 3m cartridge filters. 2k Spray Max should only be used if you have supplied air exchange, end of story. The catalyzed lacquers DO NOT contain isocyanates. They do however contain acetone and b-butyl acetate. Both of these are filtered by 3m Organic Vapor cartridges. However 3m clearly states that after using OV filters for an hour with acetone, the filter media becomes "discharged" and then fails to filter, which means it needs to be replaced after an hour of use. I really feel like you're lax on this stuff Brad. I've seen you use 2k spray max with no air supply, just filters (useless) and no goggles (it absorbs through the eyes and skin).

Do you find a big difference in recoat times with catalyzed finishes versus uncatalyzed finishes, or does that "recoat window" tend to be about the same?

what is a general time for the 2 to harden. and how soon do you need to use it after you mix the catalyst in?

here's a question.... do you see a problem with putting a precat lacquer over something that has a polyurethane finish already on it?

i have a question i got a guitar kit project coming up im going to be using enamel in spray cans my question is since this is gonna have some different colors for different parts do i need to let it fully harden before spraying the next color or just dry to touch before masking and plying the other colors ? thanks keep up the good work

So the nitro lacquer it is less toxic than the precat or catalyzer lacquer?

kind of off topic but I am buying the auto air pant and primer. is the 16 oz enough or should I go 32 oz. want to practice on some test wood first as well. thx.

ibanez guitar.

So this video was a complete waste of time.