What's your opinion on using aerosol primer to seal small areas of filler?

https://youtu.be/R2W2Na0KCiI?si=wJwHMdcevVklJkAg&t=966

Done in small spots, as shown in that video, it's fine. Works just as he says.

Aerosol primer contains a huge amount of thinner which can be problematic on exposed feathered edges. Multiple light coats are best. I keep one tin of RFU 1K primer in my mixing rack. I find that it's better to just put a little in a small gun than it is to buy aerosol cans. Certainly much cheaper and I can control the thinners content so it dries fast, doesn't react and doesn't shrink too much.

Thank you Chris. Your response much appreciated.

67Drop wrote:What's your opinion on using aerosol primer to seal small areas of filler?

https://youtu.be/R2W2Na0KCiI?si=wJwHMdcevVklJkAg&t=966

During a final sand, if I really mess up and go thru the primer and hit bare metal, I will grab the rattle can of primer and dust in a coat or 2 and after drying give it a light hit with 800 grit. Not saying that is the right way to go about it but the finished product looks good. Having said all that, if I have more than a few small places, I will mix up a sealer coat of epoxy and just go that route. However, sometimes, laziness wins out, LOL.

NFT5 wrote: I keep one tin of RFU 1K primer in my mixing rack. I find that it's better to just put a little in a small gun than it is to buy aerosol cans.

Chris, do you feel that is better/easier than a thinned coat of epoxy? What are the pros and or cons? Just cuirous.

Rebel Racing wrote:

NFT5 wrote: I keep one tin of RFU 1K primer in my mixing rack. I find that it's better to just put a little in a small gun than it is to buy aerosol cans.

Chris, do you feel that is better/easier than a thinned coat of epoxy? What are the pros and or cons? Just cuirous.

i do the same thing, if i need to spot prime a place or two I'll load some hi-build in a detail gun and spray away.
Jay D.

Rebel Racing wrote:

NFT5 wrote: I keep one tin of RFU 1K primer in my mixing rack. I find that it's better to just put a little in a small gun than it is to buy aerosol cans.

Chris, do you feel that is better/easier than a thinned coat of epoxy? What are the pros and or cons? Just cuirous.

I like 1K primer. If I have a good substrate where I don't need the primer to be a filler, just like a sealer, then I prefer it. I mix it a little thicker at about 1:1 and put on a couple of light coats. Super easy to wetsand to P800 in 20 minutes, clean and base. Also excellent for those little rubthroughs where you don't want or need to go through the whole process of a 2K primer. Sometimes you just don't need epoxy and while I do use it sometimes, it's much slower if you want to sand to a specific grit finish or need it to be ultra flat. 1K primer can also be hardened if you want a bit more durability - about 5% is plenty. It's also cheaper than having spray cans with clogged up nozzles or low on propellant that have to be chucked in the bin.

NFT5 wrote:

Rebel Racing wrote:

NFT5 wrote: I keep one tin of RFU 1K primer in my mixing rack. I find that it's better to just put a little in a small gun than it is to buy aerosol cans.

Chris, do you feel that is better/easier than a thinned coat of epoxy? What are the pros and or cons? Just cuirous.

I like 1K primer. If I have a good substrate where I don't need the primer to be a filler, just like a sealer, then I prefer it. I mix it a little thicker at about 1:1 and put on a couple of light coats. Super easy to wetsand to P800 in 20 minutes, clean and base. Also excellent for those little rubthroughs where you don't want or need to go through the whole process of a 2K primer. Sometimes you just don't need epoxy and while I do use it sometimes, it's much slower if you want to sand to a specific grit finish or need it to be ultra flat. 1K primer can also be hardened if you want a bit more durability - about 5% is plenty. It's also cheaper than having spray cans with clogged up nozzles or low on propellant that have to be chucked in the bin.

O.K. makes sence to me. Might be something that I should pick up and have on the shelf.