Why no rattle can primers?

texasking

Promoted Users
I'm sure they are better than 1K spray cans, but what exactly is in them? It is not SPI epoxy, but the cheapest junk they can purchase. Shop line epoxy cost as much (or more) than SPI, and it is absolutely terrible. Two heavy coats over bare metal left out in the weather for a few days will rust. Epoxy is not epoxy, lots of junk out there.
 

Slofut

Promoted Users
If you took your motorcycle to the paint shop to have a nice paint job, would you be ok with it if they sprayed it with 2k spray bombs? I wouldn't paint a simple bike for less than $3k just as a base line, there's too much time involved.

Likewise, if you spent hours upon hours disassembling, cleaning grease and hardened dirt, prepping and waiting for primers and fillers to dry, hours of hand sanding, redoing spots that just weren't right yet ...would you really want to piss all that work away by spraying anything on it with a spray bomb? Learn to spray paint with a paint gun for heavens sake. It aint that hard, even with a $10 HF spray gun is better.
 

Chris_Hamilton

Trying to be the best me, I can be
Why not these 2K epoxy primer rattle cans?

Spray Max

Eastwood

For painting patio furniture on a Saturday morning....probably just fine. Quality automotive refinishing.........No. Remember this Forum is focused on doing high quality, long lasting work. Both in the products we use and the techniques to accomplish the work.

If I start with pig shit, and you start with a filet mignon, there is no way we can end up with the same outcome. Same thing applies here. Sooner that someone can accept that the sooner they can start learning how to do quality work.
 
W

Wormald

Most automotive grade rattle can primers from places like Autozone and Murrays Auto parts are lacquer based aerosol primers. If you use them correctly they WILL fill 24 grit scratches and if you let the primer dry correctly they will sand the same as any other primer.
 

elwood

Promoted Users
Years ago I was sanding a tailgate to be repainted. It had lots of places where the paint had cracked. Something I noticed as I sanded it down was that everywhere the paint was cracked, someone had used that red lacquer putty that is sold in a tube. They had used it to fill their scratches in their filler work. The paint had not cracked anywhere else. Only over the red putty.
I learned something that day. Not to ever use it. It wasn't meant for the quality of work that I wanted out there with my name on it.
I say this to prevent someone painting their project to have to redo it later on. Now people can and will use what they want and I'm ok with that. But I decided way back when that this product wasn't something that I would be using.
 

crashtech

Combo Man
Most automotive grade rattle can primers from places like Autozone and Murrays Auto parts are lacquer based aerosol primers. If you use them correctly they WILL fill 24 grit scratches and if you let the primer dry correctly they will sand the same as any other primer.
Right off the bat, filling 24 grit scratches with ANY kind of primer is horribly bad procedure. The sort of practice you seem to embrace here is only used by the lowest of low end "shops," the sort that do cut rate repairs for used car lots selling junkers to people with bad credit. Will it work? Sort of. Will it last? No. Will the primer shrink into the huge scratches and reveal a lot of ugliness? Um, yeah.
 

Raymond_B

Hobbyist
There's a time and place for cheap crap, but it is not here. This is a place where professionals and talented individuals (I am neither) share their work and advice. It boggles my mind that new people basically do the internet version of barging in a room and yelling "you're wrong!".
 

John McGraw

Promoted Users
I still have 2 tubes of Nitro Stan in my cabinets! I actually still use it occasionally when I do lacquer paint. Yep I still do the occasional lacquer job for some of my Corvette friends that will not accept anything but lacquer on their judged cars!
 
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