Prime War !!!
I have been moving at snail speed... I am enjoying the process but I wish I was getting things done a little quicker.
"Don't be afraid of going slow, just be afraid of standing still"
I started with the VS, then moved to the HS and on to the Rudder. However I never set any rivets because I was busy "Almost done with my own little prime war"
witch somehow landed me the front page
How cool is that?
I kind of posted that, in the hope I would figure out how well my chosen primer compares to AKZO or other products. I received a great list of alternative products and some good ideas how to apply them. But for now I have decided to put down my weapons and end my war.
After all of the time and money spend on this topic I can honestly say if I didn't feel this crazy need to prime, I must suggest to just skip it altogether. It comes up to be a significant increase in money spend and a ridiculous amount of time added to the build time. So in case you are still undecided. Do yourself a favor and just build it without fighting this war. In the end I was looking for a product that has been widely used by others with positive feedback. This is because as soon as you choose any of the local auto paints available your project becomes the test project and you wont find out how well it works until it is to late to change... I think that is why AKZO 486-12-8 is so popular. It also helps that Boeing is using it. I tried the rattle can by Dupi color and a water based primer by Stewart Systems. I decided against them.
The primer of my choice is green! I really wanted it to be green.
The primer of my choice contains chromates to act as corrosion protection.
The primer of my choice is a 2K Epoxy based product used by Airbus
and the dutch military
The primer of my choice is fluid resistant. The usual suspects such as AVGAS.
The primer of my choice unfortunately is not solvent resistant. Meaning Acetone and some rubbing will take it off.
The thing that convinced me is that I found it extremely easy
to spray with good looking results.
I use a cheap small HVLP gun with a 1mm tip (Yes, I like it better than the 1.3mm I also have. Easier to clean as well)
I use a scale and mix 10:3 and 10% thinner by weight. I also created a spreadsheet to do the math for me. I just have to plug in what the total amount of paint that I want to mix is, and it does the rest for me. Download here
I use glass cups that weight exactly 200g to do the mixing and a paint filter before it goes into the gun.
I also spend a significant amount of time reading up on protecting my health.
According to the MSDS of AKZO one would need a minimum of a A3P3 respirator mask. I couldn't even find that on the local hardware store or on amazon...This stuff is incredibly nasty. My primer only calls for a A1P1 mask even thought it does say it is carcinogenic. I decided to wear a full body anti static suit and a A2P3 mask for added protection made by 3M. I also did some test on a few glove types to see what will withstand these chemicals best. The hospital gloves we have at school are not good for this... They will break after a few drops of thinner or acetone.
All in all I happy with this product for now. I will use it until I run out and reconsider then. I have enough for the whole Empennage kit.
Here are some pictures.
I sprayed a tac coat to promote adheason
After 5 minutes I sprayed one even coat of the primer. Goes on smooth. No runs. No fuzz.
After it dried
Now that I have this figured out things can finally move on. I really want to RIVET some parts together. Happy Holidays to all of you still reading. Hopefully I can get started on this over the holidays.