If the hole is large, use several layers, keeping each application thin so it dries thoroughly. Mr. Surfacer 500 is also great for filling in seams. Once it has dried, you can remove any excess with a swab dipped in rubbing alcohol.
Mr. Hobby Mr. Surfacer - SF-285 - Surfacer 500 Filler 40ml
Mr. Hobby Mr. Surfacer - SF-284 - Surfacer 1000 Filler 40ml
Mr. Hobby Mr. Surfacer - SF-286 - Surfacer 1200 Filler 40ml
Mr. Hobby Mr. Surfacer SF-285 Surfacer 500 Filler 40ml
Mr Hobby Mr Surfacer 1200 SF-286 40ml filler UK Seller