I filled the worst of the damage which actually went down to the glass with a vinylester gel coat that the mould has on it anyway to make sure it matches but I want to make a couple of changes anyway so I was just thinking out loud as the mess happened yesterday and today it just looked awful.. It is not as bad as it first looked but I guess I have a good weeks work to get it how I want..

I was thinking about getting it to a really good surface if possible and durabuild is good but is quite rippled when I spray it.  I can get a clear coat down really smooth out of the gun so a bit less work. But I do have some durabuild I can use and to be honest I think it will be OK using that then once the master is out then just fine tune that with a clear coat or more durabuild. 

I kept meaning to make a master but I had to get some made fast for customers and it got left.. my mistake but one I will not make again.. LOL..

If you looking for a cheap,quick fix just to pull a master fill the damaged areas with filleting wax. Smooth it out so its just below the surrounding surface. That way you will be left with slightly raised areas on the master that you can flat back and polish.

Carbon Copies Ltd

Is there a reason you don't want to use Duratec? Made almost specifically for this purpose really. Bit expensive I guess but it doesn't sound like it would need a lot. 

Make it a rule to produce a master asap your first mold is done, store away and keep for later.

http://motoform.blogspot.se

You can polish the 2k primer, no need to clear over it. Will release ok with semi perm release agent or wax.

Carbon Copies Ltd

PVA adhere's quite nicely to 2k primer.  YOu could get gloss PVA and save youreself having to clear it.

2k high build primer works well. Fills the imperfections well and can be easily polished to a gloss. The contrasting colour also makes it easier to see the repair compared to clear. Just make sure it's fully cured, bake it if you can before pulling the master. Can be applied by brush if it's only a small area and not worth setting up the spray gun.

Carbon Copies Ltd

Thats ok.... it is not size critical and I can sand it back almost to the coupling coat with no worries.. I just need to get the surface back so I can make masters again then I am going to make a  set of pre-preg moulds from the masters.. Bit pissed at the surface damage.. I have used the mould quite a lot and it has been fine but then I used some pre-preg which stuck.. The minor damage got fixed and the mould sealed and released up again then this damage happened elsewhere and the whole mould had been sealed and released.. Not sure what caused it or why so going to fix it and make a tooling wet lay master then a tooling pre-preg mould.

I'd go with 2k clear but it will sink so you'll have to sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,sand, spray,

You get the idea!