6 replies to this topic

[mozzo1]

just as title says really, i already have 1k primer and want to know if i can spray 2k over the top without it reacting or if it will is there any thing i can do to prevent it

[SolarB]

It might be possible, the only real way is to try it and see. To minimize the chance of a reaction you should apply the 2k in very thin coats and give it a chance to dry between coats.

I've had no end of problems with with 2k, primer, etch primer, stone chip and POR15 reacting with each other. Eventually I found a product called BarCoat which is brilliant, just wish I'd known about it before I started spraying. Its a ready mixed alcohol based paint that isolates paint layers, one thin coat goes on before your 2k and stops any chance of a reaction. Costs about £10 for a 1l tin and I can't stress enough how much you should use this stuff. I've spent many many days correcting problems with my paint that BarCoat would have prevented. You'll need alcohol of some sort to clean your gun as thinners doesn't touch the stuff.

[Paul Wiginton]

It will probably not react if you put the 2k on lightly as above.
The problem though is 1k paints are always slightly soft and 2k dries hard. If the softer primer moves at all, due to heat usually, it will cause the 2k topcoat to craze or crack.
Its something I see very often on old Aston Martins and classics that were originally painted in cellulose and then blown over years later in 2k

Paul

[mozzo1]

THANK YOU VERY MUCH GUYS , SO BARCOAT IT IS THEN AND I SHOULD BE PAINTING SOONER THAN I THOUGHT NOW. THANKS AGAIN

[SolarB]

THANK YOU VERY MUCH GUYS , SO BARCOAT IT IS THEN AND I SHOULD BE PAINTING SOONER THAN I THOUGHT NOW. THANKS AGAIN

Good luck.

Post some photos when it's done.

[mozzo1]

THANK YOU VERY MUCH GUYS , SO BARCOAT IT IS THEN AND I SHOULD BE PAINTING SOONER THAN I THOUGHT NOW. THANKS AGAIN

Good luck.

Post some photos when it's done.

yes i will do i have put them on my face book from last time i done it, so i,ll get my son to show me how to upload photos onto here as i dont know how to do it

[panelbeaterpeter]

Yes it can be done quite easily, if you're using basecoat apply the first few coats nice and light, if it's a solid then apply same as normal. I used to use 2k over 1k primer the whole time, (against my will if I may add..) and it always worked fine. 2k is better if you have the money and facilities.