7 replies to this topic

[Landyboy007]

Hi,

I’ve bought an expensive epoxy primer to spray onto the bare metal shell. I’ve applied the first coat, is three coats enough?
Also do I need to spray on another type of primer over the epoxy or can the top coat go straight on it?

Thanks

[sonikk4]

You won’t need three coats of epoxy. One should do followed by a filler primer.

[Vanman20]

Like most paints there'll be a window for overcoating.
For example lechler 29107 epoxy can be over coated without sanding if it's within the 24 hour window, otherwise it needs a light sanding.
Check the TDS of your particular product

[alex-95]

I've recently sprayed panels with custom 421 (https://www.rust.co....om-421-grey--36) epoxy primer. I rang them and they said 2 coats minimum. Pretty sure you can spray straight on top, depending on the paint.

[Ben_O]

Is the epoxy a sanding or non sanding type?

 

If it's a sanding type, you can apply more as it has build so can be treated like high build primer.

 

If its non sanding, you wont need any more than 2 coats. Just make sure that the first coat is light followed by a full coat

[Landyboy007]

Thanks guys, applied 3 coats and will sand down with fine grit.... what is the best grit? 3000?
Thanks

[sonscar]

400 to 600 depending on your topcoat system would be my uneducated choice.3000 may not have enough "bite", Steve..

[Ben_O]

400 is my preference if dry sanding.

 

800 if wet sanding