primer wont sand

[hogwild]

primed my truck last weekend with endura intermix 3to 1 epoxy primer, went to sand it today and it wont sand , it just plugs up paper and makes gouges.it doesnt matter what grit it use either. what now ?. reprime over it with different primer?

[Redneckchevy]

sounds like u might of mixed it wrong......I wouldnt repaint over it...Or the new primer will be floating...im pretty sure the bad stuff will have to come off....

[hogwild]

wana buy a truck? . how am i to get it of wont sand. some kind of stripper?

[JRConnieK10]

Maybe try to wet sand an area first.

[Redneckchevy]

Was it mixed to specs? or eye balled?

[hogwild]

we mixed it dead on to specs  , 3 to 1

[HAULIN IT]

Hogwild, I'm familiar with paints/primers, ect. (I own a body shop) however I'm not familiar with the Endura products. Epoxy products come in many different make-ups for different jobs. Some are used primarily for adhesion to bare metal, these do not sand very well usually, others can be epoxy based filler type primer, which should sand fairly well after drying. Did you get a product data sheet on this primer when you bought it? It may not be intended for the way you are using it or as mentioned, maybe something is mixed wrong (incompatible products, ect.) Don't panic yet! Read up on how it is described on the directions & post, We will try to help. Lorne

[Redneckchevy]

see im thinking its soft and wet...Epoxy primer should not gouge that easy...Its epoxy it should be hard......Maybe u should call the pepole that make it...maybe they would have better advice then to strip it down...

[hogwild]

 went to endura site , and it says intermix 3-1 primer is for sand blasted steel , says nothing about sanding it . i dont have instructions, primer was left overs that i had from painting a trailer.

[Redneckchevy]

Could it of gone bad?

[hogwild]

its only 1 month old , and its suposed to be good for one year after opening, maybe it needs to cure longer , but i thaugt a week should be lots of time

[Redneckchevy]

ok i got ya...But what temp are u curing it at??

[hogwild]

24HRS AT 20 than it went out side at about -15 for 4 days then back in shop for 2 days at 15-20 c

[zieg85]

Epoxies stop curing at 50 degrees F.  They all do. 

[Blazin]

In my experience if the sander speed is to high epoxies tend to smear, instead of sand.
I agree some epoxy primers are not meant to be sanded. They are meant to be topcoated within a few hours of application.
 You might have to strip it off with heavy paper or stripper.