Filler on skirting once painted

[Ohmslaw]

Painting white MDF skirtings and have filled the nail holes and painted an undercoat and primer, and two coatings of quick dry satinwood. I can still see where I've filled over the nails though, either a slight bump where I've not sanded enough or a slight curve where I guess I should've applied more.

Is there any tips to at least minimise this? I mean it doesn't look too bad, but bugging me at the same time at not being as good as id of hoped

 

[sparkwright]

You should notice anything not filled properly during the undercoating process, so you should be able to rectify before the topcoat.

 

[Deccy]

You've answered your own question really. You need to make sure you fill then sand flush.

 

[HawkEye244]

As the chaps say don't fill before applying paint. Sand down with a 60-80 grit, should only take a few swipes and then paint over with the finishing satin, don't bother applying each layer individually again