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Green95LX 04-15-2013 03:03 PM

Summit racing urethane activator
How much leeway do i have on the temp range with Summit racing urethane activator?

I have the mid-temp (70*-80*) activator. I'm worried it might get over 80* here before i get a chance to spray.

Thank you

It's for their single stage acrylic urethane, if it matters

69 widetrack 04-15-2013 03:17 PM

70 to 80 temp activator is exactly that...if the temperature rises above 80 and if it's relatively humid, look for the paint to set up fairly quickly. If it gets to be around 80 to say 83 with little humidity you shouldn't be to will set up faster and your flash times will be affected. A lot depends on how big an area your planning on painting. If it's a complete, you may need to try and get around the car quicker. What can happen and this is usually the problem, if you start say painting at the front clip, by the time you do the fender, one side of the hood, then the other side of the hood and the last fender, the paint on the first fender you just painted may be set up to the point that the paint you put on the door won't melt in and leave you with a dry edge.

Whenever I paint a complete vehicle, I use a reducer and or catalyst that is about 5 to 10 degrees cooler than what the temperature is. I can always wait a little longer for flash times, I can't always paint fast enough to avoid dry spray. Using a slower solvent or catalyst is always a wise choice. You get a better shine, smoother flatter finish and overall better gloss retention.

I wish I had better news for you but paint will react to temperature. The people selling you the product should have made you aware that painting with a slower activator or reducer would lend to getting you a better result, this is one of the joys of buying a technically dependent product from an on line company. If your doing a smaller area, or parts...paint away, you should be fine.

Hope this helps...if not for this case, than for any thing you paint in the future.

Best Regards


Green95LX 04-15-2013 03:19 PM

It's actually a seadoo, the hood and top deck.

69 widetrack 04-15-2013 03:29 PM

It's a Seadoo...not that large an area (not as large as a complete car anyway) and i see that it's also a Urethane product. If it's Acrylic will still set up fairly quickly if the temperature gets to warm. If it's a Poly Urethane, it will take longer to set up, giving you plenty of time to get around the vehicle. Another variable that will either speed up or slow down the curing process of the paint is air movement and the conditions that you are painting in. If there is a fair amount of air movement, the paint will top cure and could cause solvent popping, if there is minimal air movement, the solvents that are released in the curing of the paint will have no where to go and cause the paint to loose it's shine.

I know, it's like many things to remember...LOL.

If you have any further questions feel free to ask, I'll answer whatever I can.


Green95LX 04-15-2013 03:32 PM

i just hate to think i messed up and wasted my money buying the wrong activator

69 widetrack 04-15-2013 03:44 PM

It's a Seadoo...not that big a beast...unless it gets to be in the 90's, you should be able to get around the boat, doo, water vehicle...whatever you want to call it. Are you painting it inside, in a booth? Not being in direct sunlight when you paint would help as well.

Like I said, it's not that big, you should be able to get around it.


Green95LX 04-15-2013 03:44 PM

Yes, i plan to paint it in my garage

69 widetrack 04-15-2013 03:51 PM

You'll be fine...If I can ask a this your first painting experience? The reason I ask is I sense a case of nerves...If that's the case, don't worry, put the paint on the way you want it to careful on curves and inside edges (that's where paint likes to hang out and run). Take the attitude that you are the master and you will make it shine. If you make a mistake, fix it later. I painted a fender about a week ago, Honda Civic (neighbor's car otherwise I wouldn't do it) a run in the clear on the body line. Fixed it later...and I've been painting for over 30 years, it only happens to the good painters...LOL.


Green95LX 04-15-2013 03:57 PM

Yes, it's my first "real paint" experience. I sprayed black epoxy on the bottom and it came out ok, but there's plenty of flaws. Since the top and hood show more, i'm hoping i'll have better luck this time.

69 widetrack 04-15-2013 04:05 PM

Well, it seemed to me that this may be a first time...just by the tension in the words that you posted. I'll try and help. So, in order for me to help, I'll need a bit more information.

What kind of Epoxy Primer did you apply, was it Summit's house Brand?
If it was, how long ago did you apply the Epoxy, is it in the window of re-coating without sanding?
Summit Epoxy Primers can be sanded...if the imperfections that you mentioned are to the point that they will drastically effect the finish, can you sand these imperfections out?

If you can answer these questions, I'll better be able to help you out and hopefully instill some self confidence in you so that you can walk in and hit that Seadoo with a shiny coat of paint.

You'll be fine.


Green95LX 04-15-2013 04:08 PM

It wasn't epoxy primer, it was just epoxy resin with a black colorant in it. I sprayed it, sanded and buffed it. Came out looking gloss black. Now for the top i bought summit's 2k urethane primer surfacer. What i was getting at is that i've only used an HVLP gun a few times and never with "real paint"

69 widetrack 04-15-2013 04:37 PM we are getting important information...first thing you need to do now is stop. We want the paint to stick...if you say you applied Epoxy, in this arena, that means Primer...there's a big difference between Epoxy resin with black colorant and Epoxy Primer. What grit of paper did you sand it with and why did you buff it? Epoxy resin with black colorant will be shiny when it's buffed, however, your paint will not stick to a slick, buffed surface. If your going to apply the 2K Primer over top of your Epoxy can't be won't have any mechanical adhesion. You are going to need to sand the Epoxy Resin that you applied with a 400 grit to 600 grit wet paper, it should not be shiny, it should be dull, that way your 2K Primer will stick to the Epoxy Resin. Once you apply the 2K Primer...that in turn, when cured, will need to be sanded so that it looks dull, then apply your paint.

Why did you apply the Epoxy Resin with Black colorant in it? Was this to repair some areas that had cracks in the original substrate? Please answer these questions...I just want this to turn out for you. Using an HVLP Gun isn't going to change any of the characteristics of the material your putting on the Seadoo.


Green95LX 04-15-2013 05:25 PM

2 Attachment(s)
I'm sorry, i'm confusing the hell out of you. The bottom is done, it's flipped over and now i'm going to paint the top and hood. They are still gelcoat, except where i have made some repairs. I have not applied anything or sanded except in the areas of repair. The bottom was originally yellow, i made a filler putty and filled the gouges in. Sprayed the black epoxy simply to change the color.

Pictures attached
Attachment 73231

Attachment 73232

69 widetrack 04-15-2013 05:37 PM

Okay, yes, i was getting confused. So, what you need to do now is paint the top. This is where the 2K Primer comes in over your repair area?


Green95LX 04-15-2013 05:40 PM

Yes, i have several areas i repaired cracks in the gelcoat, trying to feel my way through this now.

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