Do I need another primer coat?

Talk Composites - The Forum for Advanced Composites

Back

Do I need another primer coat?

Author	Message
kevjames	kevjames posted 10 Years Ago HOT Topic Details
Group: Forum Members Posts: 2, Visits: 17	Hi, I am making a buck for a nose cone for a kit car. I made the Base shape and then covered in filler, sanded to smooth(ish), and since then I have applied three coats of pattern-coat primer. The first two coats were sanded with 120 grit, the third with 240 grit. I now have the buck really smooth, BUT I have still gone through the primer into the filler in several places. Despite going through the primer, the surface is now really smooth and even - so my question is, can I move on to the pattern coat high gloss now? Or do I need to ensure that there is no filler showing through the primer? I probably have enough primer for one coat left, but it's taken about 6 hours of sanding on this last coat due to the constant clogging of the sandpaper so I want to avoid another primer coat if possible. Apologies if this is a stupid question - this is the first time I have tried something like this (as may be apparent from the fact after three coat I'm still going through to the primer!) Cheers, Kev.
	Reply Like 4
The Fibreglass King	The Fibreglass King posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 69, Visits: 652	Hello Kevjames, To be honest you should be good to carry on to gloss now. When I do plug work I only tend to use just primer coat and bring that to a gloss shine with body filler visible through the primer. As long as you apply a good release system you should be fine Any blemishes on the mould can also be refinished as well, hope this is helpful Kind Regards The Fibreglass King...
	Reply Like 3
MarkMK	MarkMK posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 338, Visits: 2K	You should be fine moving straight onto the gloss coat now The only issue I found when preparing a pattern in similar circumstances was that some patches of the filler were pulled away fron the pattern when demoulding and these seemed to be areas where I'd flatted a little too much and gone through the gloss down to the filler beneath. Being clear on top of white it wasn't so easy to spot but didn't cause too much of a problem and didn't bond to the mould.
	Reply Like 4
kevjames	kevjames posted 10 Years Ago HOT Post Details
Group: Forum Members Posts: 2, Visits: 17	Thanks to both of you for the replies. When I get home I'm going for gloss and polishing!
	Reply Like 4