Catalyzed Base Coat???? | Page 2 - Southern Polyurethanes Forum

Jim C;n said: bob, i used hok for years, every day. its not a bad paint but its not great either. dont mistake a well marketed product for a high quality one. just like any paint company they have good products and bad. i have no problem using some of their stuff still today but in general i stopped using their stuff on a daily basis about 7 years ago. there are just far better lines out there. you can mix any of their colors right off any mixing rack and have it cover twice as good. for your question though, i have always activated hok. while i dont know how much reactivity there actually is in the bases but catalyst doesnt necessarily need to react with the base to work. catalyst hardens on its own. take the cap off a qt of cat that you have used, gotten some in the threads and sat on a shelf for a few weeks. its turns to rock hard plastic. it will still do that within the paint film over time. with no reactivity it might not give the full benefit but its gonna add something.

Curious what are you using when doing all that airbrush work. What kind of paint and are you catalyzing it every time you add in more color?

jtfx;n said: I didn't know this, how important is it? So far I always went from whatever the highest percentage is to the lowest. Asking about Urethane SS and Clear...

It's not neccesarily true, for example PPG says to add 5% DX57 by volume to RTS(ready to spray) DBC. What I've always done. Honestly until I started reading around on this forum I had no idea you could use something other than what a manufacturer specified for your basecoat activator. it's been awhile since I posted...I remember a few years back I added clear coat hardner to Omni plus and it had a weird reaction, it started coagulating or something like that...ruined the quart. I know Omni plus is crap paint but did I do something wrong ? or is this one of the paints you can't do that to ? the reason I ask is I'm painting a car and the owner is friends with the paint supplier and this is the paint I will be using...probably should not add hardner ??

Dave C 5;n said: it's been awhile since I posted...I remember a few years back I added clear coat hardner to Omni plus and it had a weird reaction, it started coagulating or something like that...ruined the quart. I know Omni plus is crap paint but did I do something wrong ? or is this one of the paints you can't do that to ? the reason I ask is I'm painting a car and the owner is friends with the paint supplier and this is the paint I will be using...probably should not add hardner ??

That must have been a fluke reaction. I sell SPI in BC and deal with many shops using omni plus. I have personally activated it with all three SPI clear activators without a problem. I have also seen painters activate it and never seen it do anything weird like that.