Group: Forum Members
Posts: 338,
Visits: 2K
|
In terms of the clay, I'm not certain how tough or durable it is, but if it's anything like the consistency of most car body fillers/bondo, then it might be necessary to give it a fairly light covering of grp to provide some strength to resist the stresses of de-moulding, even if you did apply a good painted coating. Otherwise it might be prone to breaking up when you come to prise it from the mould, with sections sticking to the mould surface.
Sometimes cleaning such things up afterwards can work okay if the stuck sections will come away with careful use of razor blades and scrapers but depending upon your coating choice you could end up with bits that'll pull away bits of the mould coating as well
Of course, reinforcing your plug with GRP will alter the dimensions slightly and require a fair bit of finishing work, but the initial de-moulding process can sometimes be quite destructive on plugs that aren't strong and resistant to a bit of bending as you try to get underneath them. If it's a fairly simple shape, it might not pose too great a problem, but if you've got deep returns and angles to contend with, things might not pop-out so readily
|