P60G2 spraying questions

[DRitz]

Good afternoon VAF,

I'm hoping to not ignite the great primer debate with this question. I decided to go the SW P60g2 route with priming my RV-8. I already bought the two gallons so I'm really committed at this point. I haven't been able to practice spraying it on any scraps yet since I reside in the artic (South Dakota). We're actually doing well today since we have positive single digit highs. My first question is what temperature range does it need to be for it to be properly sprayed and cure? I can't seem to find any info on the forums or the 2 page data sheet online. If priming isn't an option, is there any issue with building on and priming (and riveting) later? Obviously a salt air environment isn't a concern here, but does some corrosion set in immediately no matter the location?

I picked up a HVLP kit from the local ABS store. It came with 3 different guns: 1.8 mm, 1.4 mm, and 1.0 mm. Which one would be the best for priming with the SW product?

I welcome any other advice from those that have gone before me. Any mistake averted is a win in my book.

Thanks in advance,
Dustin

[rvbuilder2002]

Originally Posted by DRitz

Good afternoon VAF,

I'm hoping to not ignite the great primer debate with this question. I decided to go the SW P60g2 route with priming my RV-8. I already bought the two gallons so I'm really committed at this point. I haven't been able to practice spraying it on any scraps yet since I reside in the artic (South Dakota). We're actually doing well today since we have positive single digit highs. My first question is what temperature range does it need to be for it to be properly sprayed and cure? I can't seem to find any info on the forums or the 2 page data sheet online. If priming isn't an option, is there any issue with building on and priming (and riveting) later? Obviously a salt air environment isn't a concern here, but does some corrosion set in immediately no matter the location?

I picked up a HVLP kit from the local ABS store. It came with 3 different guns: 1.8 mm, 1.4 mm, and 1.0 mm. Which one would be the best for priming with the SW product?

I welcome any other advice from those that have gone before me. Any mistake averted is a win in my book.

Thanks in advance,
Dustin

I have sprayed a lot of it but never at temps below about 60 F. in the shop.

A 1.4 tip does a good job.

The biggest benefit of priming tends to be protection of mating surfaces where moisture can stay trapped for extended periods. Spraying after assembly greatly reduces the value from the cost and effort in my opinion.
If you had to assembly without priming but wanted some protection I think you would be better off with a fogged in protectant (ACF-50, etc.)

Side tip - I have found over the years that some of the cans are thicker than others and that adding just 150% reducer wasn't enough. I always buy 2 gal of reducer for 1 gal of primer and mix 1.75:1, and sometimes even 2:1

[vic syracuse]

I have the same experience as Scott. At low temps it can get stringy when you spray it, and it does require aggressive thinning.

A trick I found worked was to sit the spray gun AND parts in front of a infrared radiant heater. Both items would get warm and stay warm long enough for spraying. Just the act of spraying causes the temp of the fluid to decrease in temp, so warming it up helps. Just don't let it stay there too long so it gets too hot (fire hazard).

Vic

[wirejock]

I sprayed everything inside with P60G2. Thinned 1 part primer to 2 parts catalyst. Lots of it done down to 30 degrees outside by setting everything up and running parts and gun out just long enough to shoot. A few tips...
1. Take the primer to a nearby SW paint store or Ace and have them shake the bejesus out of it. Before use, stir the bejesus out of it.
2. Shoot just enough to see a color change. It's a very thin coat and darkens to a beautiful greenish gold hue.
I can give tons of advise. You may want to PM for phone number and call.

[DRitz]

Scott, Vic, Larry,

Thank you for the input and ideas. This initial learning curve is always intimidating but these tips will help.

Looking forward to seeing you all at an airport sometime in the future,

Dustin