I would like to know what's the dangers of painting a car with out sealer?

example this is how it should be done...
body work, primer, block sand, primer, block sand, sealer, sand again and paint...

 

If the clear is in good condition and absolutely no adhesion problems, not using sealer is OK as long as you prep correctly and use good paint. If your doing a color change with a totally different color or a color that has poor coverage, sealing/ tinted sealer is a good idea to ensure full uniform coverage. Also sealer is typically a wet on wet process like this:

body work, primer, block sand& prep, sealer, and paint...

With proper flash times of course.

 

ok well i gues my bodyshop guy did not use a sealer. the car looks okay but is in the progress of color sanding and buffing so it doesn't show it's full potential yet. I will post pictures

 

sealer is like a cheap prepwork insurance, use it.

sometime if you have sh0tty bodywork underneath, the paint will penerate thru and develop gator back, blister or just peeling off.

they sell epoxy primer/sealer in one so that's pretty much a 2 solution in 1 fix.

 

Can I use epoxy primer/sealer with diffrent types of paint? Or does it have to be from the same brand?

 

If you plan on spraying wet on wet, do a test panel and let it cure first to be sure it doesn't cause problems. Depends on the quality of the product also, I wouldn't use a cheap budget epoxy primer/sealer w/ quality base/clear. I would just spend the extra money to have the same paint line products personally, unless its a total beater. Doesn't hurt to try if your low on the flow, just make sure you let it fully cure to determain if you'll be ok. If your using quality stuff and their is no obvious conflicts between the products as far as do's and dont's and you follow the correct flash times & mixing ratio's, you should be fine.

 

if you can afford it, then use the good stuff.

ASK,read the tech sheet and call the reps if you are unsure, they are there for a reason.

a decent 2k sealer/primer will be almost always better than painting without one, esp when you have some bodywork done.

sometime it doesn't need it but why risk it? if you have the body blocked down, just laid it down, no need to sand anything unless you suck at spraying