Repairing GRP topside - lots of small holes and imperfections!

[Eccles291]

What exactly did you order ?

This stuff: Gelcoat Filler.

 

[PaulRainbow]

This stuff: Gelcoat Filler.

Technically, you can use that, but it's not the easiest stuff to use. If you were repairing a crack or a small hole in GRP and you were not going to paint over it, it's good stuff. As you plan to paint it would be much simpler and easier to use something like Plastic Padding Marine Filler (Polyester) such as : Plastic Padding (Teroson UP 610) Marine Filler Large | Force 4 Chandlery

Easier to work with and easier to sand etc.

 

[PCUK]

To get it nice - is precisely why I would shy away from glassing it ...

Properly ??? Who decides what is 'properly' ??

As said the OP decides. Each to his own my properly is obviously different to yours.

 

[Eccles291]

Technically, you can use that, but it's not the easiest stuff to use. If you were repairing a crack or a small hole in GRP and you were not going to paint over it, it's good stuff. As you plan to paint it would be much simpler and easier to use something like Plastic Padding Marine Filler (Polyester) such as : Plastic Padding (Teroson UP 610) Marine Filler Large | Force 4 Chandlery

Easier to work with and easier to sand etc.

Well, the gelcoat filler arrived today but it’s only a small tin (500g) so I’ll keep it as it may come in handy with all the other stuff that needs doing. Meantime I’ll get some of that Plastic Padding you recommend, especially if it’s going to make the job less of a ball ache. Thanks.

 

[Eccles291]

... Plastic Padding Marine Filler (Polyester) such as : Plastic Padding (Teroson UP 610) Marine Filler Large | Force 4 Chandlery

I managed to find that same size online for £25 delivered at Gael Force Marine, so that'll arrive next week and I can get on with things.